Activity.java revision f2a8b3c450f0570c1ad0ee6e0fae3cfb85bfb4de
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.app; 18 19import com.android.internal.app.ActionBarImpl; 20import com.android.internal.policy.PolicyManager; 21 22import android.content.ComponentCallbacks; 23import android.content.ComponentName; 24import android.content.ContentResolver; 25import android.content.Context; 26import android.content.CursorLoader; 27import android.content.IIntentSender; 28import android.content.Intent; 29import android.content.IntentSender; 30import android.content.SharedPreferences; 31import android.content.pm.ActivityInfo; 32import android.content.res.Configuration; 33import android.content.res.Resources; 34import android.content.res.TypedArray; 35import android.database.Cursor; 36import android.graphics.Bitmap; 37import android.graphics.Canvas; 38import android.graphics.drawable.Drawable; 39import android.media.AudioManager; 40import android.net.Uri; 41import android.os.Build; 42import android.os.Bundle; 43import android.os.Handler; 44import android.os.IBinder; 45import android.os.Looper; 46import android.os.Parcelable; 47import android.os.RemoteException; 48import android.os.StrictMode; 49import android.text.Selection; 50import android.text.SpannableStringBuilder; 51import android.text.TextUtils; 52import android.text.method.TextKeyListener; 53import android.util.AttributeSet; 54import android.util.Config; 55import android.util.EventLog; 56import android.util.Log; 57import android.util.SparseArray; 58import android.view.ActionMode; 59import android.view.ContextMenu; 60import android.view.ContextMenu.ContextMenuInfo; 61import android.view.ContextThemeWrapper; 62import android.view.KeyEvent; 63import android.view.LayoutInflater; 64import android.view.Menu; 65import android.view.MenuInflater; 66import android.view.MenuItem; 67import android.view.MotionEvent; 68import android.view.View; 69import android.view.View.OnCreateContextMenuListener; 70import android.view.ViewGroup; 71import android.view.ViewGroup.LayoutParams; 72import android.view.ViewManager; 73import android.view.Window; 74import android.view.WindowManager; 75import android.view.accessibility.AccessibilityEvent; 76import android.widget.AdapterView; 77 78import java.io.FileDescriptor; 79import java.io.PrintWriter; 80import java.util.ArrayList; 81import java.util.HashMap; 82 83/** 84 * An activity is a single, focused thing that the user can do. Almost all 85 * activities interact with the user, so the Activity class takes care of 86 * creating a window for you in which you can place your UI with 87 * {@link #setContentView}. While activities are often presented to the user 88 * as full-screen windows, they can also be used in other ways: as floating 89 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 90 * or embedded inside of another activity (using {@link ActivityGroup}). 91 * 92 * There are two methods almost all subclasses of Activity will implement: 93 * 94 * <ul> 95 * <li> {@link #onCreate} is where you initialize your activity. Most 96 * importantly, here you will usually call {@link #setContentView(int)} 97 * with a layout resource defining your UI, and using {@link #findViewById} 98 * to retrieve the widgets in that UI that you need to interact with 99 * programmatically. 100 * 101 * <li> {@link #onPause} is where you deal with the user leaving your 102 * activity. Most importantly, any changes made by the user should at this 103 * point be committed (usually to the 104 * {@link android.content.ContentProvider} holding the data). 105 * </ul> 106 * 107 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 108 * activity classes must have a corresponding 109 * {@link android.R.styleable#AndroidManifestActivity <activity>} 110 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 111 * 112 * <p>The Activity class is an important part of an application's overall lifecycle, 113 * and the way activities are launched and put together is a fundamental 114 * part of the platform's application model. For a detailed perspective on the structure of 115 * Android applications and lifecycles, please read the <em>Dev Guide</em> document on 116 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a>.</p> 117 * 118 * <p>Topics covered here: 119 * <ol> 120 * <li><a href="#Fragments">Fragments</a> 121 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 122 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 123 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 124 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 125 * <li><a href="#Permissions">Permissions</a> 126 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 127 * </ol> 128 * 129 * <a name="Fragments"></a> 130 * <h3>Fragments</h3> 131 * 132 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 133 * implementations can make use of the {@link Fragment} class to better 134 * modularize their code, build more sophisticated user interfaces for larger 135 * screens, and help scale their application between small and large screens. 136 * 137 * <a name="ActivityLifecycle"></a> 138 * <h3>Activity Lifecycle</h3> 139 * 140 * <p>Activities in the system are managed as an <em>activity stack</em>. 141 * When a new activity is started, it is placed on the top of the stack 142 * and becomes the running activity -- the previous activity always remains 143 * below it in the stack, and will not come to the foreground again until 144 * the new activity exits.</p> 145 * 146 * <p>An activity has essentially four states:</p> 147 * <ul> 148 * <li> If an activity in the foreground of the screen (at the top of 149 * the stack), 150 * it is <em>active</em> or <em>running</em>. </li> 151 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 152 * or transparent activity has focus on top of your activity), it 153 * is <em>paused</em>. A paused activity is completely alive (it 154 * maintains all state and member information and remains attached to 155 * the window manager), but can be killed by the system in extreme 156 * low memory situations. 157 * <li>If an activity is completely obscured by another activity, 158 * it is <em>stopped</em>. It still retains all state and member information, 159 * however, it is no longer visible to the user so its window is hidden 160 * and it will often be killed by the system when memory is needed 161 * elsewhere.</li> 162 * <li>If an activity is paused or stopped, the system can drop the activity 163 * from memory by either asking it to finish, or simply killing its 164 * process. When it is displayed again to the user, it must be 165 * completely restarted and restored to its previous state.</li> 166 * </ul> 167 * 168 * <p>The following diagram shows the important state paths of an Activity. 169 * The square rectangles represent callback methods you can implement to 170 * perform operations when the Activity moves between states. The colored 171 * ovals are major states the Activity can be in.</p> 172 * 173 * <p><img src="../../../images/activity_lifecycle.png" 174 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 175 * 176 * <p>There are three key loops you may be interested in monitoring within your 177 * activity: 178 * 179 * <ul> 180 * <li>The <b>entire lifetime</b> of an activity happens between the first call 181 * to {@link android.app.Activity#onCreate} through to a single final call 182 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 183 * of "global" state in onCreate(), and release all remaining resources in 184 * onDestroy(). For example, if it has a thread running in the background 185 * to download data from the network, it may create that thread in onCreate() 186 * and then stop the thread in onDestroy(). 187 * 188 * <li>The <b>visible lifetime</b> of an activity happens between a call to 189 * {@link android.app.Activity#onStart} until a corresponding call to 190 * {@link android.app.Activity#onStop}. During this time the user can see the 191 * activity on-screen, though it may not be in the foreground and interacting 192 * with the user. Between these two methods you can maintain resources that 193 * are needed to show the activity to the user. For example, you can register 194 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 195 * that impact your UI, and unregister it in onStop() when the user an no 196 * longer see what you are displaying. The onStart() and onStop() methods 197 * can be called multiple times, as the activity becomes visible and hidden 198 * to the user. 199 * 200 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 201 * {@link android.app.Activity#onResume} until a corresponding call to 202 * {@link android.app.Activity#onPause}. During this time the activity is 203 * in front of all other activities and interacting with the user. An activity 204 * can frequently go between the resumed and paused states -- for example when 205 * the device goes to sleep, when an activity result is delivered, when a new 206 * intent is delivered -- so the code in these methods should be fairly 207 * lightweight. 208 * </ul> 209 * 210 * <p>The entire lifecycle of an activity is defined by the following 211 * Activity methods. All of these are hooks that you can override 212 * to do appropriate work when the activity changes state. All 213 * activities will implement {@link android.app.Activity#onCreate} 214 * to do their initial setup; many will also implement 215 * {@link android.app.Activity#onPause} to commit changes to data and 216 * otherwise prepare to stop interacting with the user. You should always 217 * call up to your superclass when implementing these methods.</p> 218 * 219 * </p> 220 * <pre class="prettyprint"> 221 * public class Activity extends ApplicationContext { 222 * protected void onCreate(Bundle savedInstanceState); 223 * 224 * protected void onStart(); 225 * 226 * protected void onRestart(); 227 * 228 * protected void onResume(); 229 * 230 * protected void onPause(); 231 * 232 * protected void onStop(); 233 * 234 * protected void onDestroy(); 235 * } 236 * </pre> 237 * 238 * <p>In general the movement through an activity's lifecycle looks like 239 * this:</p> 240 * 241 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 242 * <colgroup align="left" span="3" /> 243 * <colgroup align="left" /> 244 * <colgroup align="center" /> 245 * <colgroup align="center" /> 246 * 247 * <thead> 248 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 249 * </thead> 250 * 251 * <tbody> 252 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 253 * <td>Called when the activity is first created. 254 * This is where you should do all of your normal static set up: 255 * create views, bind data to lists, etc. This method also 256 * provides you with a Bundle containing the activity's previously 257 * frozen state, if there was one. 258 * <p>Always followed by <code>onStart()</code>.</td> 259 * <td align="center">No</td> 260 * <td align="center"><code>onStart()</code></td> 261 * </tr> 262 * 263 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 264 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 265 * <td>Called after your activity has been stopped, prior to it being 266 * started again. 267 * <p>Always followed by <code>onStart()</code></td> 268 * <td align="center">No</td> 269 * <td align="center"><code>onStart()</code></td> 270 * </tr> 271 * 272 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 273 * <td>Called when the activity is becoming visible to the user. 274 * <p>Followed by <code>onResume()</code> if the activity comes 275 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 276 * <td align="center">No</td> 277 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 278 * </tr> 279 * 280 * <tr><td rowspan="2" style="border-left: none;"> </td> 281 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 282 * <td>Called when the activity will start 283 * interacting with the user. At this point your activity is at 284 * the top of the activity stack, with user input going to it. 285 * <p>Always followed by <code>onPause()</code>.</td> 286 * <td align="center">No</td> 287 * <td align="center"><code>onPause()</code></td> 288 * </tr> 289 * 290 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 291 * <td>Called when the system is about to start resuming a previous 292 * activity. This is typically used to commit unsaved changes to 293 * persistent data, stop animations and other things that may be consuming 294 * CPU, etc. Implementations of this method must be very quick because 295 * the next activity will not be resumed until this method returns. 296 * <p>Followed by either <code>onResume()</code> if the activity 297 * returns back to the front, or <code>onStop()</code> if it becomes 298 * invisible to the user.</td> 299 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 300 * <td align="center"><code>onResume()</code> or<br> 301 * <code>onStop()</code></td> 302 * </tr> 303 * 304 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 305 * <td>Called when the activity is no longer visible to the user, because 306 * another activity has been resumed and is covering this one. This 307 * may happen either because a new activity is being started, an existing 308 * one is being brought in front of this one, or this one is being 309 * destroyed. 310 * <p>Followed by either <code>onRestart()</code> if 311 * this activity is coming back to interact with the user, or 312 * <code>onDestroy()</code> if this activity is going away.</td> 313 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 314 * <td align="center"><code>onRestart()</code> or<br> 315 * <code>onDestroy()</code></td> 316 * </tr> 317 * 318 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 319 * <td>The final call you receive before your 320 * activity is destroyed. This can happen either because the 321 * activity is finishing (someone called {@link Activity#finish} on 322 * it, or because the system is temporarily destroying this 323 * instance of the activity to save space. You can distinguish 324 * between these two scenarios with the {@link 325 * Activity#isFinishing} method.</td> 326 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 327 * <td align="center"><em>nothing</em></td> 328 * </tr> 329 * </tbody> 330 * </table> 331 * 332 * <p>Note the "Killable" column in the above table -- for those methods that 333 * are marked as being killable, after that method returns the process hosting the 334 * activity may killed by the system <em>at any time</em> without another line 335 * of its code being executed. Because of this, you should use the 336 * {@link #onPause} method to write any persistent data (such as user edits) 337 * to storage. In addition, the method 338 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 339 * in such a background state, allowing you to save away any dynamic instance 340 * state in your activity into the given Bundle, to be later received in 341 * {@link #onCreate} if the activity needs to be re-created. 342 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 343 * section for more information on how the lifecycle of a process is tied 344 * to the activities it is hosting. Note that it is important to save 345 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 346 * because the later is not part of the lifecycle callbacks, so will not 347 * be called in every situation as described in its documentation.</p> 348 * 349 * <p class="note">Be aware that these semantics will change slightly between 350 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 351 * vs. those targeting prior platforms. Starting with Honeycomb, an application 352 * is not in the killable state until its {@link #onStop} has returned. This 353 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 354 * safely called after {@link #onPause()} and allows and application to safely 355 * wait until {@link #onStop()} to save persistent state.</p> 356 * 357 * <p>For those methods that are not marked as being killable, the activity's 358 * process will not be killed by the system starting from the time the method 359 * is called and continuing after it returns. Thus an activity is in the killable 360 * state, for example, between after <code>onPause()</code> to the start of 361 * <code>onResume()</code>.</p> 362 * 363 * <a name="ConfigurationChanges"></a> 364 * <h3>Configuration Changes</h3> 365 * 366 * <p>If the configuration of the device (as defined by the 367 * {@link Configuration Resources.Configuration} class) changes, 368 * then anything displaying a user interface will need to update to match that 369 * configuration. Because Activity is the primary mechanism for interacting 370 * with the user, it includes special support for handling configuration 371 * changes.</p> 372 * 373 * <p>Unless you specify otherwise, a configuration change (such as a change 374 * in screen orientation, language, input devices, etc) will cause your 375 * current activity to be <em>destroyed</em>, going through the normal activity 376 * lifecycle process of {@link #onPause}, 377 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 378 * had been in the foreground or visible to the user, once {@link #onDestroy} is 379 * called in that instance then a new instance of the activity will be 380 * created, with whatever savedInstanceState the previous instance had generated 381 * from {@link #onSaveInstanceState}.</p> 382 * 383 * <p>This is done because any application resource, 384 * including layout files, can change based on any configuration value. Thus 385 * the only safe way to handle a configuration change is to re-retrieve all 386 * resources, including layouts, drawables, and strings. Because activities 387 * must already know how to save their state and re-create themselves from 388 * that state, this is a convenient way to have an activity restart itself 389 * with a new configuration.</p> 390 * 391 * <p>In some special cases, you may want to bypass restarting of your 392 * activity based on one or more types of configuration changes. This is 393 * done with the {@link android.R.attr#configChanges android:configChanges} 394 * attribute in its manifest. For any types of configuration changes you say 395 * that you handle there, you will receive a call to your current activity's 396 * {@link #onConfigurationChanged} method instead of being restarted. If 397 * a configuration change involves any that you do not handle, however, the 398 * activity will still be restarted and {@link #onConfigurationChanged} 399 * will not be called.</p> 400 * 401 * <a name="StartingActivities"></a> 402 * <h3>Starting Activities and Getting Results</h3> 403 * 404 * <p>The {@link android.app.Activity#startActivity} 405 * method is used to start a 406 * new activity, which will be placed at the top of the activity stack. It 407 * takes a single argument, an {@link android.content.Intent Intent}, 408 * which describes the activity 409 * to be executed.</p> 410 * 411 * <p>Sometimes you want to get a result back from an activity when it 412 * ends. For example, you may start an activity that lets the user pick 413 * a person in a list of contacts; when it ends, it returns the person 414 * that was selected. To do this, you call the 415 * {@link android.app.Activity#startActivityForResult(Intent, int)} 416 * version with a second integer parameter identifying the call. The result 417 * will come back through your {@link android.app.Activity#onActivityResult} 418 * method.</p> 419 * 420 * <p>When an activity exits, it can call 421 * {@link android.app.Activity#setResult(int)} 422 * to return data back to its parent. It must always supply a result code, 423 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 424 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 425 * return back an Intent containing any additional data it wants. All of this 426 * information appears back on the 427 * parent's <code>Activity.onActivityResult()</code>, along with the integer 428 * identifier it originally supplied.</p> 429 * 430 * <p>If a child activity fails for any reason (such as crashing), the parent 431 * activity will receive a result with the code RESULT_CANCELED.</p> 432 * 433 * <pre class="prettyprint"> 434 * public class MyActivity extends Activity { 435 * ... 436 * 437 * static final int PICK_CONTACT_REQUEST = 0; 438 * 439 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 440 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 441 * // When the user center presses, let them pick a contact. 442 * startActivityForResult( 443 * new Intent(Intent.ACTION_PICK, 444 * new Uri("content://contacts")), 445 * PICK_CONTACT_REQUEST); 446 * return true; 447 * } 448 * return false; 449 * } 450 * 451 * protected void onActivityResult(int requestCode, int resultCode, 452 * Intent data) { 453 * if (requestCode == PICK_CONTACT_REQUEST) { 454 * if (resultCode == RESULT_OK) { 455 * // A contact was picked. Here we will just display it 456 * // to the user. 457 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 458 * } 459 * } 460 * } 461 * } 462 * </pre> 463 * 464 * <a name="SavingPersistentState"></a> 465 * <h3>Saving Persistent State</h3> 466 * 467 * <p>There are generally two kinds of persistent state than an activity 468 * will deal with: shared document-like data (typically stored in a SQLite 469 * database using a {@linkplain android.content.ContentProvider content provider}) 470 * and internal state such as user preferences.</p> 471 * 472 * <p>For content provider data, we suggest that activities use a 473 * "edit in place" user model. That is, any edits a user makes are effectively 474 * made immediately without requiring an additional confirmation step. 475 * Supporting this model is generally a simple matter of following two rules:</p> 476 * 477 * <ul> 478 * <li> <p>When creating a new document, the backing database entry or file for 479 * it is created immediately. For example, if the user chooses to write 480 * a new e-mail, a new entry for that e-mail is created as soon as they 481 * start entering data, so that if they go to any other activity after 482 * that point this e-mail will now appear in the list of drafts.</p> 483 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 484 * commit to the backing content provider or file any changes the user 485 * has made. This ensures that those changes will be seen by any other 486 * activity that is about to run. You will probably want to commit 487 * your data even more aggressively at key times during your 488 * activity's lifecycle: for example before starting a new 489 * activity, before finishing your own activity, when the user 490 * switches between input fields, etc.</p> 491 * </ul> 492 * 493 * <p>This model is designed to prevent data loss when a user is navigating 494 * between activities, and allows the system to safely kill an activity (because 495 * system resources are needed somewhere else) at any time after it has been 496 * paused. Note this implies 497 * that the user pressing BACK from your activity does <em>not</em> 498 * mean "cancel" -- it means to leave the activity with its current contents 499 * saved away. Canceling edits in an activity must be provided through 500 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 501 * 502 * <p>See the {@linkplain android.content.ContentProvider content package} for 503 * more information about content providers. These are a key aspect of how 504 * different activities invoke and propagate data between themselves.</p> 505 * 506 * <p>The Activity class also provides an API for managing internal persistent state 507 * associated with an activity. This can be used, for example, to remember 508 * the user's preferred initial display in a calendar (day view or week view) 509 * or the user's default home page in a web browser.</p> 510 * 511 * <p>Activity persistent state is managed 512 * with the method {@link #getPreferences}, 513 * allowing you to retrieve and 514 * modify a set of name/value pairs associated with the activity. To use 515 * preferences that are shared across multiple application components 516 * (activities, receivers, services, providers), you can use the underlying 517 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 518 * to retrieve a preferences 519 * object stored under a specific name. 520 * (Note that it is not possible to share settings data across application 521 * packages -- for that you will need a content provider.)</p> 522 * 523 * <p>Here is an excerpt from a calendar activity that stores the user's 524 * preferred view mode in its persistent settings:</p> 525 * 526 * <pre class="prettyprint"> 527 * public class CalendarActivity extends Activity { 528 * ... 529 * 530 * static final int DAY_VIEW_MODE = 0; 531 * static final int WEEK_VIEW_MODE = 1; 532 * 533 * private SharedPreferences mPrefs; 534 * private int mCurViewMode; 535 * 536 * protected void onCreate(Bundle savedInstanceState) { 537 * super.onCreate(savedInstanceState); 538 * 539 * SharedPreferences mPrefs = getSharedPreferences(); 540 * mCurViewMode = mPrefs.getInt("view_mode" DAY_VIEW_MODE); 541 * } 542 * 543 * protected void onPause() { 544 * super.onPause(); 545 * 546 * SharedPreferences.Editor ed = mPrefs.edit(); 547 * ed.putInt("view_mode", mCurViewMode); 548 * ed.commit(); 549 * } 550 * } 551 * </pre> 552 * 553 * <a name="Permissions"></a> 554 * <h3>Permissions</h3> 555 * 556 * <p>The ability to start a particular Activity can be enforced when it is 557 * declared in its 558 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 559 * tag. By doing so, other applications will need to declare a corresponding 560 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 561 * element in their own manifest to be able to start that activity. 562 * 563 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 564 * document for more information on permissions and security in general. 565 * 566 * <a name="ProcessLifecycle"></a> 567 * <h3>Process Lifecycle</h3> 568 * 569 * <p>The Android system attempts to keep application process around for as 570 * long as possible, but eventually will need to remove old processes when 571 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 572 * Lifecycle</a>, the decision about which process to remove is intimately 573 * tied to the state of the user's interaction with it. In general, there 574 * are four states a process can be in based on the activities running in it, 575 * listed here in order of importance. The system will kill less important 576 * processes (the last ones) before it resorts to killing more important 577 * processes (the first ones). 578 * 579 * <ol> 580 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 581 * that the user is currently interacting with) is considered the most important. 582 * Its process will only be killed as a last resort, if it uses more memory 583 * than is available on the device. Generally at this point the device has 584 * reached a memory paging state, so this is required in order to keep the user 585 * interface responsive. 586 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 587 * but not in the foreground, such as one sitting behind a foreground dialog) 588 * is considered extremely important and will not be killed unless that is 589 * required to keep the foreground activity running. 590 * <li> <p>A <b>background activity</b> (an activity that is not visible to 591 * the user and has been paused) is no longer critical, so the system may 592 * safely kill its process to reclaim memory for other foreground or 593 * visible processes. If its process needs to be killed, when the user navigates 594 * back to the activity (making it visible on the screen again), its 595 * {@link #onCreate} method will be called with the savedInstanceState it had previously 596 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 597 * state as the user last left it. 598 * <li> <p>An <b>empty process</b> is one hosting no activities or other 599 * application components (such as {@link Service} or 600 * {@link android.content.BroadcastReceiver} classes). These are killed very 601 * quickly by the system as memory becomes low. For this reason, any 602 * background operation you do outside of an activity must be executed in the 603 * context of an activity BroadcastReceiver or Service to ensure that the system 604 * knows it needs to keep your process around. 605 * </ol> 606 * 607 * <p>Sometimes an Activity may need to do a long-running operation that exists 608 * independently of the activity lifecycle itself. An example may be a camera 609 * application that allows you to upload a picture to a web site. The upload 610 * may take a long time, and the application should allow the user to leave 611 * the application will it is executing. To accomplish this, your Activity 612 * should start a {@link Service} in which the upload takes place. This allows 613 * the system to properly prioritize your process (considering it to be more 614 * important than other non-visible applications) for the duration of the 615 * upload, independent of whether the original activity is paused, stopped, 616 * or finished. 617 */ 618public class Activity extends ContextThemeWrapper 619 implements LayoutInflater.Factory2, 620 Window.Callback, KeyEvent.Callback, 621 OnCreateContextMenuListener, ComponentCallbacks { 622 private static final String TAG = "Activity"; 623 624 /** Standard activity result: operation canceled. */ 625 public static final int RESULT_CANCELED = 0; 626 /** Standard activity result: operation succeeded. */ 627 public static final int RESULT_OK = -1; 628 /** Start of user-defined activity results. */ 629 public static final int RESULT_FIRST_USER = 1; 630 631 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 632 private static final String FRAGMENTS_TAG = "android:fragments"; 633 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 634 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 635 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 636 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 637 638 private static class ManagedDialog { 639 Dialog mDialog; 640 Bundle mArgs; 641 } 642 private SparseArray<ManagedDialog> mManagedDialogs; 643 644 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 645 private Instrumentation mInstrumentation; 646 private IBinder mToken; 647 private int mIdent; 648 /*package*/ String mEmbeddedID; 649 private Application mApplication; 650 /*package*/ Intent mIntent; 651 private ComponentName mComponent; 652 /*package*/ ActivityInfo mActivityInfo; 653 /*package*/ ActivityThread mMainThread; 654 Activity mParent; 655 boolean mCalled; 656 boolean mCheckedForLoaderManager; 657 boolean mLoadersStarted; 658 /*package*/ boolean mResumed; 659 private boolean mStopped; 660 boolean mFinished; 661 boolean mStartedActivity; 662 /** true if the activity is going through a transient pause */ 663 /*package*/ boolean mTemporaryPause = false; 664 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 665 /*package*/ boolean mChangingConfigurations = false; 666 /*package*/ int mConfigChangeFlags; 667 /*package*/ Configuration mCurrentConfig; 668 private SearchManager mSearchManager; 669 670 static final class NonConfigurationInstances { 671 Object activity; 672 HashMap<String, Object> children; 673 ArrayList<Fragment> fragments; 674 SparseArray<LoaderManagerImpl> loaders; 675 } 676 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 677 678 private Window mWindow; 679 680 private WindowManager mWindowManager; 681 /*package*/ View mDecor = null; 682 /*package*/ boolean mWindowAdded = false; 683 /*package*/ boolean mVisibleFromServer = false; 684 /*package*/ boolean mVisibleFromClient = true; 685 /*package*/ ActionBarImpl mActionBar = null; 686 687 private CharSequence mTitle; 688 private int mTitleColor = 0; 689 690 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 691 692 SparseArray<LoaderManagerImpl> mAllLoaderManagers; 693 LoaderManagerImpl mLoaderManager; 694 695 private static final class ManagedCursor { 696 ManagedCursor(Cursor cursor) { 697 mCursor = cursor; 698 mReleased = false; 699 mUpdated = false; 700 } 701 702 private final Cursor mCursor; 703 private boolean mReleased; 704 private boolean mUpdated; 705 } 706 private final ArrayList<ManagedCursor> mManagedCursors = 707 new ArrayList<ManagedCursor>(); 708 709 // protected by synchronized (this) 710 int mResultCode = RESULT_CANCELED; 711 Intent mResultData = null; 712 713 private boolean mTitleReady = false; 714 715 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 716 private SpannableStringBuilder mDefaultKeySsb = null; 717 718 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 719 720 private Thread mUiThread; 721 final Handler mHandler = new Handler(); 722 723 /** Return the intent that started this activity. */ 724 public Intent getIntent() { 725 return mIntent; 726 } 727 728 /** 729 * Change the intent returned by {@link #getIntent}. This holds a 730 * reference to the given intent; it does not copy it. Often used in 731 * conjunction with {@link #onNewIntent}. 732 * 733 * @param newIntent The new Intent object to return from getIntent 734 * 735 * @see #getIntent 736 * @see #onNewIntent 737 */ 738 public void setIntent(Intent newIntent) { 739 mIntent = newIntent; 740 } 741 742 /** Return the application that owns this activity. */ 743 public final Application getApplication() { 744 return mApplication; 745 } 746 747 /** Is this activity embedded inside of another activity? */ 748 public final boolean isChild() { 749 return mParent != null; 750 } 751 752 /** Return the parent activity if this view is an embedded child. */ 753 public final Activity getParent() { 754 return mParent; 755 } 756 757 /** Retrieve the window manager for showing custom windows. */ 758 public WindowManager getWindowManager() { 759 return mWindowManager; 760 } 761 762 /** 763 * Retrieve the current {@link android.view.Window} for the activity. 764 * This can be used to directly access parts of the Window API that 765 * are not available through Activity/Screen. 766 * 767 * @return Window The current window, or null if the activity is not 768 * visual. 769 */ 770 public Window getWindow() { 771 return mWindow; 772 } 773 774 /** 775 * Return the LoaderManager for this fragment, creating it if needed. 776 */ 777 public LoaderManager getLoaderManager() { 778 if (mLoaderManager != null) { 779 return mLoaderManager; 780 } 781 mCheckedForLoaderManager = true; 782 mLoaderManager = getLoaderManager(-1, mLoadersStarted, true); 783 return mLoaderManager; 784 } 785 786 LoaderManagerImpl getLoaderManager(int index, boolean started, boolean create) { 787 if (mAllLoaderManagers == null) { 788 mAllLoaderManagers = new SparseArray<LoaderManagerImpl>(); 789 } 790 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 791 if (lm == null) { 792 if (create) { 793 lm = new LoaderManagerImpl(this, started); 794 mAllLoaderManagers.put(index, lm); 795 } 796 } else { 797 lm.updateActivity(this); 798 } 799 return lm; 800 } 801 802 /** 803 * Calls {@link android.view.Window#getCurrentFocus} on the 804 * Window of this Activity to return the currently focused view. 805 * 806 * @return View The current View with focus or null. 807 * 808 * @see #getWindow 809 * @see android.view.Window#getCurrentFocus 810 */ 811 public View getCurrentFocus() { 812 return mWindow != null ? mWindow.getCurrentFocus() : null; 813 } 814 815 @Override 816 public int getWallpaperDesiredMinimumWidth() { 817 int width = super.getWallpaperDesiredMinimumWidth(); 818 return width <= 0 ? getWindowManager().getDefaultDisplay().getWidth() : width; 819 } 820 821 @Override 822 public int getWallpaperDesiredMinimumHeight() { 823 int height = super.getWallpaperDesiredMinimumHeight(); 824 return height <= 0 ? getWindowManager().getDefaultDisplay().getHeight() : height; 825 } 826 827 /** 828 * Called when the activity is starting. This is where most initialization 829 * should go: calling {@link #setContentView(int)} to inflate the 830 * activity's UI, using {@link #findViewById} to programmatically interact 831 * with widgets in the UI, calling 832 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 833 * cursors for data being displayed, etc. 834 * 835 * <p>You can call {@link #finish} from within this function, in 836 * which case onDestroy() will be immediately called without any of the rest 837 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 838 * {@link #onPause}, etc) executing. 839 * 840 * <p><em>Derived classes must call through to the super class's 841 * implementation of this method. If they do not, an exception will be 842 * thrown.</em></p> 843 * 844 * @param savedInstanceState If the activity is being re-initialized after 845 * previously being shut down then this Bundle contains the data it most 846 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 847 * 848 * @see #onStart 849 * @see #onSaveInstanceState 850 * @see #onRestoreInstanceState 851 * @see #onPostCreate 852 */ 853 protected void onCreate(Bundle savedInstanceState) { 854 if (mLastNonConfigurationInstances != null) { 855 mAllLoaderManagers = mLastNonConfigurationInstances.loaders; 856 } 857 if (savedInstanceState != null) { 858 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 859 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 860 ? mLastNonConfigurationInstances.fragments : null); 861 } 862 mFragments.dispatchCreate(); 863 mCalled = true; 864 } 865 866 /** 867 * The hook for {@link ActivityThread} to restore the state of this activity. 868 * 869 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 870 * {@link #restoreManagedDialogs(android.os.Bundle)}. 871 * 872 * @param savedInstanceState contains the saved state 873 */ 874 final void performRestoreInstanceState(Bundle savedInstanceState) { 875 onRestoreInstanceState(savedInstanceState); 876 restoreManagedDialogs(savedInstanceState); 877 } 878 879 /** 880 * This method is called after {@link #onStart} when the activity is 881 * being re-initialized from a previously saved state, given here in 882 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 883 * to restore their state, but it is sometimes convenient to do it here 884 * after all of the initialization has been done or to allow subclasses to 885 * decide whether to use your default implementation. The default 886 * implementation of this method performs a restore of any view state that 887 * had previously been frozen by {@link #onSaveInstanceState}. 888 * 889 * <p>This method is called between {@link #onStart} and 890 * {@link #onPostCreate}. 891 * 892 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 893 * 894 * @see #onCreate 895 * @see #onPostCreate 896 * @see #onResume 897 * @see #onSaveInstanceState 898 */ 899 protected void onRestoreInstanceState(Bundle savedInstanceState) { 900 if (mWindow != null) { 901 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 902 if (windowState != null) { 903 mWindow.restoreHierarchyState(windowState); 904 } 905 } 906 } 907 908 /** 909 * Restore the state of any saved managed dialogs. 910 * 911 * @param savedInstanceState The bundle to restore from. 912 */ 913 private void restoreManagedDialogs(Bundle savedInstanceState) { 914 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 915 if (b == null) { 916 return; 917 } 918 919 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 920 final int numDialogs = ids.length; 921 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 922 for (int i = 0; i < numDialogs; i++) { 923 final Integer dialogId = ids[i]; 924 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 925 if (dialogState != null) { 926 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 927 // so tell createDialog() not to do it, otherwise we get an exception 928 final ManagedDialog md = new ManagedDialog(); 929 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 930 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 931 if (md.mDialog != null) { 932 mManagedDialogs.put(dialogId, md); 933 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 934 md.mDialog.onRestoreInstanceState(dialogState); 935 } 936 } 937 } 938 } 939 940 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 941 final Dialog dialog = onCreateDialog(dialogId, args); 942 if (dialog == null) { 943 return null; 944 } 945 dialog.dispatchOnCreate(state); 946 return dialog; 947 } 948 949 private static String savedDialogKeyFor(int key) { 950 return SAVED_DIALOG_KEY_PREFIX + key; 951 } 952 953 private static String savedDialogArgsKeyFor(int key) { 954 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 955 } 956 957 /** 958 * Called when activity start-up is complete (after {@link #onStart} 959 * and {@link #onRestoreInstanceState} have been called). Applications will 960 * generally not implement this method; it is intended for system 961 * classes to do final initialization after application code has run. 962 * 963 * <p><em>Derived classes must call through to the super class's 964 * implementation of this method. If they do not, an exception will be 965 * thrown.</em></p> 966 * 967 * @param savedInstanceState If the activity is being re-initialized after 968 * previously being shut down then this Bundle contains the data it most 969 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 970 * @see #onCreate 971 */ 972 protected void onPostCreate(Bundle savedInstanceState) { 973 if (!isChild()) { 974 mTitleReady = true; 975 onTitleChanged(getTitle(), getTitleColor()); 976 } 977 mCalled = true; 978 } 979 980 /** 981 * Called after {@link #onCreate} — or after {@link #onRestart} when 982 * the activity had been stopped, but is now again being displayed to the 983 * user. It will be followed by {@link #onResume}. 984 * 985 * <p><em>Derived classes must call through to the super class's 986 * implementation of this method. If they do not, an exception will be 987 * thrown.</em></p> 988 * 989 * @see #onCreate 990 * @see #onStop 991 * @see #onResume 992 */ 993 protected void onStart() { 994 mCalled = true; 995 996 if (!mLoadersStarted) { 997 mLoadersStarted = true; 998 if (mLoaderManager != null) { 999 mLoaderManager.doStart(); 1000 } else if (!mCheckedForLoaderManager) { 1001 mLoaderManager = getLoaderManager(-1, mLoadersStarted, false); 1002 } 1003 mCheckedForLoaderManager = true; 1004 } 1005 } 1006 1007 /** 1008 * Called after {@link #onStop} when the current activity is being 1009 * re-displayed to the user (the user has navigated back to it). It will 1010 * be followed by {@link #onStart} and then {@link #onResume}. 1011 * 1012 * <p>For activities that are using raw {@link Cursor} objects (instead of 1013 * creating them through 1014 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1015 * this is usually the place 1016 * where the cursor should be requeried (because you had deactivated it in 1017 * {@link #onStop}. 1018 * 1019 * <p><em>Derived classes must call through to the super class's 1020 * implementation of this method. If they do not, an exception will be 1021 * thrown.</em></p> 1022 * 1023 * @see #onStop 1024 * @see #onStart 1025 * @see #onResume 1026 */ 1027 protected void onRestart() { 1028 mCalled = true; 1029 } 1030 1031 /** 1032 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1033 * {@link #onPause}, for your activity to start interacting with the user. 1034 * This is a good place to begin animations, open exclusive-access devices 1035 * (such as the camera), etc. 1036 * 1037 * <p>Keep in mind that onResume is not the best indicator that your activity 1038 * is visible to the user; a system window such as the keyguard may be in 1039 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1040 * activity is visible to the user (for example, to resume a game). 1041 * 1042 * <p><em>Derived classes must call through to the super class's 1043 * implementation of this method. If they do not, an exception will be 1044 * thrown.</em></p> 1045 * 1046 * @see #onRestoreInstanceState 1047 * @see #onRestart 1048 * @see #onPostResume 1049 * @see #onPause 1050 */ 1051 protected void onResume() { 1052 mCalled = true; 1053 } 1054 1055 /** 1056 * Called when activity resume is complete (after {@link #onResume} has 1057 * been called). Applications will generally not implement this method; 1058 * it is intended for system classes to do final setup after application 1059 * resume code has run. 1060 * 1061 * <p><em>Derived classes must call through to the super class's 1062 * implementation of this method. If they do not, an exception will be 1063 * thrown.</em></p> 1064 * 1065 * @see #onResume 1066 */ 1067 protected void onPostResume() { 1068 final Window win = getWindow(); 1069 if (win != null) win.makeActive(); 1070 mCalled = true; 1071 } 1072 1073 /** 1074 * This is called for activities that set launchMode to "singleTop" in 1075 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1076 * flag when calling {@link #startActivity}. In either case, when the 1077 * activity is re-launched while at the top of the activity stack instead 1078 * of a new instance of the activity being started, onNewIntent() will be 1079 * called on the existing instance with the Intent that was used to 1080 * re-launch it. 1081 * 1082 * <p>An activity will always be paused before receiving a new intent, so 1083 * you can count on {@link #onResume} being called after this method. 1084 * 1085 * <p>Note that {@link #getIntent} still returns the original Intent. You 1086 * can use {@link #setIntent} to update it to this new Intent. 1087 * 1088 * @param intent The new intent that was started for the activity. 1089 * 1090 * @see #getIntent 1091 * @see #setIntent 1092 * @see #onResume 1093 */ 1094 protected void onNewIntent(Intent intent) { 1095 } 1096 1097 /** 1098 * The hook for {@link ActivityThread} to save the state of this activity. 1099 * 1100 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1101 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1102 * 1103 * @param outState The bundle to save the state to. 1104 */ 1105 final void performSaveInstanceState(Bundle outState) { 1106 onSaveInstanceState(outState); 1107 saveManagedDialogs(outState); 1108 } 1109 1110 /** 1111 * Called to retrieve per-instance state from an activity before being killed 1112 * so that the state can be restored in {@link #onCreate} or 1113 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1114 * will be passed to both). 1115 * 1116 * <p>This method is called before an activity may be killed so that when it 1117 * comes back some time in the future it can restore its state. For example, 1118 * if activity B is launched in front of activity A, and at some point activity 1119 * A is killed to reclaim resources, activity A will have a chance to save the 1120 * current state of its user interface via this method so that when the user 1121 * returns to activity A, the state of the user interface can be restored 1122 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1123 * 1124 * <p>Do not confuse this method with activity lifecycle callbacks such as 1125 * {@link #onPause}, which is always called when an activity is being placed 1126 * in the background or on its way to destruction, or {@link #onStop} which 1127 * is called before destruction. One example of when {@link #onPause} and 1128 * {@link #onStop} is called and not this method is when a user navigates back 1129 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1130 * on B because that particular instance will never be restored, so the 1131 * system avoids calling it. An example when {@link #onPause} is called and 1132 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1133 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1134 * killed during the lifetime of B since the state of the user interface of 1135 * A will stay intact. 1136 * 1137 * <p>The default implementation takes care of most of the UI per-instance 1138 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1139 * view in the hierarchy that has an id, and by saving the id of the currently 1140 * focused view (all of which is restored by the default implementation of 1141 * {@link #onRestoreInstanceState}). If you override this method to save additional 1142 * information not captured by each individual view, you will likely want to 1143 * call through to the default implementation, otherwise be prepared to save 1144 * all of the state of each view yourself. 1145 * 1146 * <p>If called, this method will occur before {@link #onStop}. There are 1147 * no guarantees about whether it will occur before or after {@link #onPause}. 1148 * 1149 * @param outState Bundle in which to place your saved state. 1150 * 1151 * @see #onCreate 1152 * @see #onRestoreInstanceState 1153 * @see #onPause 1154 */ 1155 protected void onSaveInstanceState(Bundle outState) { 1156 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1157 Parcelable p = mFragments.saveAllState(); 1158 if (p != null) { 1159 outState.putParcelable(FRAGMENTS_TAG, p); 1160 } 1161 } 1162 1163 /** 1164 * Save the state of any managed dialogs. 1165 * 1166 * @param outState place to store the saved state. 1167 */ 1168 private void saveManagedDialogs(Bundle outState) { 1169 if (mManagedDialogs == null) { 1170 return; 1171 } 1172 1173 final int numDialogs = mManagedDialogs.size(); 1174 if (numDialogs == 0) { 1175 return; 1176 } 1177 1178 Bundle dialogState = new Bundle(); 1179 1180 int[] ids = new int[mManagedDialogs.size()]; 1181 1182 // save each dialog's bundle, gather the ids 1183 for (int i = 0; i < numDialogs; i++) { 1184 final int key = mManagedDialogs.keyAt(i); 1185 ids[i] = key; 1186 final ManagedDialog md = mManagedDialogs.valueAt(i); 1187 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1188 if (md.mArgs != null) { 1189 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1190 } 1191 } 1192 1193 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1194 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1195 } 1196 1197 1198 /** 1199 * Called as part of the activity lifecycle when an activity is going into 1200 * the background, but has not (yet) been killed. The counterpart to 1201 * {@link #onResume}. 1202 * 1203 * <p>When activity B is launched in front of activity A, this callback will 1204 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1205 * so be sure to not do anything lengthy here. 1206 * 1207 * <p>This callback is mostly used for saving any persistent state the 1208 * activity is editing, to present a "edit in place" model to the user and 1209 * making sure nothing is lost if there are not enough resources to start 1210 * the new activity without first killing this one. This is also a good 1211 * place to do things like stop animations and other things that consume a 1212 * noticeable mount of CPU in order to make the switch to the next activity 1213 * as fast as possible, or to close resources that are exclusive access 1214 * such as the camera. 1215 * 1216 * <p>In situations where the system needs more memory it may kill paused 1217 * processes to reclaim resources. Because of this, you should be sure 1218 * that all of your state is saved by the time you return from 1219 * this function. In general {@link #onSaveInstanceState} is used to save 1220 * per-instance state in the activity and this method is used to store 1221 * global persistent data (in content providers, files, etc.) 1222 * 1223 * <p>After receiving this call you will usually receive a following call 1224 * to {@link #onStop} (after the next activity has been resumed and 1225 * displayed), however in some cases there will be a direct call back to 1226 * {@link #onResume} without going through the stopped state. 1227 * 1228 * <p><em>Derived classes must call through to the super class's 1229 * implementation of this method. If they do not, an exception will be 1230 * thrown.</em></p> 1231 * 1232 * @see #onResume 1233 * @see #onSaveInstanceState 1234 * @see #onStop 1235 */ 1236 protected void onPause() { 1237 mCalled = true; 1238 } 1239 1240 /** 1241 * Called as part of the activity lifecycle when an activity is about to go 1242 * into the background as the result of user choice. For example, when the 1243 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1244 * when an incoming phone call causes the in-call Activity to be automatically 1245 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1246 * the activity being interrupted. In cases when it is invoked, this method 1247 * is called right before the activity's {@link #onPause} callback. 1248 * 1249 * <p>This callback and {@link #onUserInteraction} are intended to help 1250 * activities manage status bar notifications intelligently; specifically, 1251 * for helping activities determine the proper time to cancel a notfication. 1252 * 1253 * @see #onUserInteraction() 1254 */ 1255 protected void onUserLeaveHint() { 1256 } 1257 1258 /** 1259 * Generate a new thumbnail for this activity. This method is called before 1260 * pausing the activity, and should draw into <var>outBitmap</var> the 1261 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1262 * can use the given <var>canvas</var>, which is configured to draw into the 1263 * bitmap, for rendering if desired. 1264 * 1265 * <p>The default implementation returns fails and does not draw a thumbnail; 1266 * this will result in the platform creating its own thumbnail if needed. 1267 * 1268 * @param outBitmap The bitmap to contain the thumbnail. 1269 * @param canvas Can be used to render into the bitmap. 1270 * 1271 * @return Return true if you have drawn into the bitmap; otherwise after 1272 * you return it will be filled with a default thumbnail. 1273 * 1274 * @see #onCreateDescription 1275 * @see #onSaveInstanceState 1276 * @see #onPause 1277 */ 1278 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1279 return false; 1280 } 1281 1282 /** 1283 * Generate a new description for this activity. This method is called 1284 * before pausing the activity and can, if desired, return some textual 1285 * description of its current state to be displayed to the user. 1286 * 1287 * <p>The default implementation returns null, which will cause you to 1288 * inherit the description from the previous activity. If all activities 1289 * return null, generally the label of the top activity will be used as the 1290 * description. 1291 * 1292 * @return A description of what the user is doing. It should be short and 1293 * sweet (only a few words). 1294 * 1295 * @see #onCreateThumbnail 1296 * @see #onSaveInstanceState 1297 * @see #onPause 1298 */ 1299 public CharSequence onCreateDescription() { 1300 return null; 1301 } 1302 1303 /** 1304 * Called when you are no longer visible to the user. You will next 1305 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1306 * depending on later user activity. 1307 * 1308 * <p>Note that this method may never be called, in low memory situations 1309 * where the system does not have enough memory to keep your activity's 1310 * process running after its {@link #onPause} method is called. 1311 * 1312 * <p><em>Derived classes must call through to the super class's 1313 * implementation of this method. If they do not, an exception will be 1314 * thrown.</em></p> 1315 * 1316 * @see #onRestart 1317 * @see #onResume 1318 * @see #onSaveInstanceState 1319 * @see #onDestroy 1320 */ 1321 protected void onStop() { 1322 mCalled = true; 1323 } 1324 1325 /** 1326 * Perform any final cleanup before an activity is destroyed. This can 1327 * happen either because the activity is finishing (someone called 1328 * {@link #finish} on it, or because the system is temporarily destroying 1329 * this instance of the activity to save space. You can distinguish 1330 * between these two scenarios with the {@link #isFinishing} method. 1331 * 1332 * <p><em>Note: do not count on this method being called as a place for 1333 * saving data! For example, if an activity is editing data in a content 1334 * provider, those edits should be committed in either {@link #onPause} or 1335 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1336 * free resources like threads that are associated with an activity, so 1337 * that a destroyed activity does not leave such things around while the 1338 * rest of its application is still running. There are situations where 1339 * the system will simply kill the activity's hosting process without 1340 * calling this method (or any others) in it, so it should not be used to 1341 * do things that are intended to remain around after the process goes 1342 * away. 1343 * 1344 * <p><em>Derived classes must call through to the super class's 1345 * implementation of this method. If they do not, an exception will be 1346 * thrown.</em></p> 1347 * 1348 * @see #onPause 1349 * @see #onStop 1350 * @see #finish 1351 * @see #isFinishing 1352 */ 1353 protected void onDestroy() { 1354 mCalled = true; 1355 1356 // dismiss any dialogs we are managing. 1357 if (mManagedDialogs != null) { 1358 final int numDialogs = mManagedDialogs.size(); 1359 for (int i = 0; i < numDialogs; i++) { 1360 final ManagedDialog md = mManagedDialogs.valueAt(i); 1361 if (md.mDialog.isShowing()) { 1362 md.mDialog.dismiss(); 1363 } 1364 } 1365 mManagedDialogs = null; 1366 } 1367 1368 // close any cursors we are managing. 1369 synchronized (mManagedCursors) { 1370 int numCursors = mManagedCursors.size(); 1371 for (int i = 0; i < numCursors; i++) { 1372 ManagedCursor c = mManagedCursors.get(i); 1373 if (c != null) { 1374 c.mCursor.close(); 1375 } 1376 } 1377 mManagedCursors.clear(); 1378 } 1379 1380 // Close any open search dialog 1381 if (mSearchManager != null) { 1382 mSearchManager.stopSearch(); 1383 } 1384 } 1385 1386 /** 1387 * Called by the system when the device configuration changes while your 1388 * activity is running. Note that this will <em>only</em> be called if 1389 * you have selected configurations you would like to handle with the 1390 * {@link android.R.attr#configChanges} attribute in your manifest. If 1391 * any configuration change occurs that is not selected to be reported 1392 * by that attribute, then instead of reporting it the system will stop 1393 * and restart the activity (to have it launched with the new 1394 * configuration). 1395 * 1396 * <p>At the time that this function has been called, your Resources 1397 * object will have been updated to return resource values matching the 1398 * new configuration. 1399 * 1400 * @param newConfig The new device configuration. 1401 */ 1402 public void onConfigurationChanged(Configuration newConfig) { 1403 mCalled = true; 1404 1405 mFragments.dispatchConfigurationChanged(newConfig); 1406 1407 if (mWindow != null) { 1408 // Pass the configuration changed event to the window 1409 mWindow.onConfigurationChanged(newConfig); 1410 } 1411 } 1412 1413 /** 1414 * If this activity is being destroyed because it can not handle a 1415 * configuration parameter being changed (and thus its 1416 * {@link #onConfigurationChanged(Configuration)} method is 1417 * <em>not</em> being called), then you can use this method to discover 1418 * the set of changes that have occurred while in the process of being 1419 * destroyed. Note that there is no guarantee that these will be 1420 * accurate (other changes could have happened at any time), so you should 1421 * only use this as an optimization hint. 1422 * 1423 * @return Returns a bit field of the configuration parameters that are 1424 * changing, as defined by the {@link android.content.res.Configuration} 1425 * class. 1426 */ 1427 public int getChangingConfigurations() { 1428 return mConfigChangeFlags; 1429 } 1430 1431 /** 1432 * Retrieve the non-configuration instance data that was previously 1433 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1434 * be available from the initial {@link #onCreate} and 1435 * {@link #onStart} calls to the new instance, allowing you to extract 1436 * any useful dynamic state from the previous instance. 1437 * 1438 * <p>Note that the data you retrieve here should <em>only</em> be used 1439 * as an optimization for handling configuration changes. You should always 1440 * be able to handle getting a null pointer back, and an activity must 1441 * still be able to restore itself to its previous state (through the 1442 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1443 * function returns null. 1444 * 1445 * @return Returns the object previously returned by 1446 * {@link #onRetainNonConfigurationInstance()}. 1447 */ 1448 public Object getLastNonConfigurationInstance() { 1449 return mLastNonConfigurationInstances != null 1450 ? mLastNonConfigurationInstances.activity : null; 1451 } 1452 1453 /** 1454 * Called by the system, as part of destroying an 1455 * activity due to a configuration change, when it is known that a new 1456 * instance will immediately be created for the new configuration. You 1457 * can return any object you like here, including the activity instance 1458 * itself, which can later be retrieved by calling 1459 * {@link #getLastNonConfigurationInstance()} in the new activity 1460 * instance. 1461 * 1462 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1463 * or later, consider instead using a {@link Fragment} with 1464 * {@link Fragment#setRetainInstance(boolean) 1465 * Fragment.setRetainInstance(boolean}.</em> 1466 * 1467 * <p>This function is called purely as an optimization, and you must 1468 * not rely on it being called. When it is called, a number of guarantees 1469 * will be made to help optimize configuration switching: 1470 * <ul> 1471 * <li> The function will be called between {@link #onStop} and 1472 * {@link #onDestroy}. 1473 * <li> A new instance of the activity will <em>always</em> be immediately 1474 * created after this one's {@link #onDestroy()} is called. In particular, 1475 * <em>no</em> messages will be dispatched during this time (when the returned 1476 * object does not have an activity to be associated with). 1477 * <li> The object you return here will <em>always</em> be available from 1478 * the {@link #getLastNonConfigurationInstance()} method of the following 1479 * activity instance as described there. 1480 * </ul> 1481 * 1482 * <p>These guarantees are designed so that an activity can use this API 1483 * to propagate extensive state from the old to new activity instance, from 1484 * loaded bitmaps, to network connections, to evenly actively running 1485 * threads. Note that you should <em>not</em> propagate any data that 1486 * may change based on the configuration, including any data loaded from 1487 * resources such as strings, layouts, or drawables. 1488 * 1489 * <p>The guarantee of no message handling during the switch to the next 1490 * activity simplifies use with active objects. For example if your retained 1491 * state is an {@link android.os.AsyncTask} you are guaranteed that its 1492 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 1493 * not be called from the call here until you execute the next instance's 1494 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 1495 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 1496 * running in a separate thread.) 1497 * 1498 * @return Return any Object holding the desired state to propagate to the 1499 * next activity instance. 1500 */ 1501 public Object onRetainNonConfigurationInstance() { 1502 return null; 1503 } 1504 1505 /** 1506 * Retrieve the non-configuration instance data that was previously 1507 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1508 * be available from the initial {@link #onCreate} and 1509 * {@link #onStart} calls to the new instance, allowing you to extract 1510 * any useful dynamic state from the previous instance. 1511 * 1512 * <p>Note that the data you retrieve here should <em>only</em> be used 1513 * as an optimization for handling configuration changes. You should always 1514 * be able to handle getting a null pointer back, and an activity must 1515 * still be able to restore itself to its previous state (through the 1516 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1517 * function returns null. 1518 * 1519 * @return Returns the object previously returned by 1520 * {@link #onRetainNonConfigurationChildInstances()} 1521 */ 1522 HashMap<String, Object> getLastNonConfigurationChildInstances() { 1523 return mLastNonConfigurationInstances != null 1524 ? mLastNonConfigurationInstances.children : null; 1525 } 1526 1527 /** 1528 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1529 * it should return either a mapping from child activity id strings to arbitrary objects, 1530 * or null. This method is intended to be used by Activity framework subclasses that control a 1531 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1532 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1533 */ 1534 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1535 return null; 1536 } 1537 1538 NonConfigurationInstances retainNonConfigurationInstances() { 1539 Object activity = onRetainNonConfigurationInstance(); 1540 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 1541 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 1542 boolean retainLoaders = false; 1543 if (mAllLoaderManagers != null) { 1544 // prune out any loader managers that were already stopped and so 1545 // have nothing useful to retain. 1546 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 1547 LoaderManagerImpl lm = mAllLoaderManagers.valueAt(i); 1548 if (lm.mRetaining) { 1549 retainLoaders = true; 1550 } else { 1551 lm.doDestroy(); 1552 mAllLoaderManagers.removeAt(i); 1553 } 1554 } 1555 } 1556 if (activity == null && children == null && fragments == null && !retainLoaders) { 1557 return null; 1558 } 1559 1560 NonConfigurationInstances nci = new NonConfigurationInstances(); 1561 nci.activity = activity; 1562 nci.children = children; 1563 nci.fragments = fragments; 1564 nci.loaders = mAllLoaderManagers; 1565 return nci; 1566 } 1567 1568 public void onLowMemory() { 1569 mCalled = true; 1570 mFragments.dispatchLowMemory(); 1571 } 1572 1573 /** 1574 * Return the FragmentManager for interacting with fragments associated 1575 * with this activity. 1576 */ 1577 public FragmentManager getFragmentManager() { 1578 return mFragments; 1579 } 1580 1581 void invalidateFragmentIndex(int index) { 1582 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 1583 if (mAllLoaderManagers != null) { 1584 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 1585 if (lm != null) { 1586 lm.doDestroy(); 1587 } 1588 mAllLoaderManagers.remove(index); 1589 } 1590 } 1591 1592 /** 1593 * Called when a Fragment is being attached to this activity, immediately 1594 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 1595 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 1596 */ 1597 public void onAttachFragment(Fragment fragment) { 1598 } 1599 1600 /** 1601 * Wrapper around 1602 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1603 * that gives the resulting {@link Cursor} to call 1604 * {@link #startManagingCursor} so that the activity will manage its 1605 * lifecycle for you. 1606 * 1607 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1608 * or later, consider instead using {@link LoaderManager} instead, available 1609 * via {@link #getLoaderManager()}.</em> 1610 * 1611 * @param uri The URI of the content provider to query. 1612 * @param projection List of columns to return. 1613 * @param selection SQL WHERE clause. 1614 * @param sortOrder SQL ORDER BY clause. 1615 * 1616 * @return The Cursor that was returned by query(). 1617 * 1618 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1619 * @see #startManagingCursor 1620 * @hide 1621 * 1622 * @deprecated Use {@link CursorLoader} instead. 1623 */ 1624 @Deprecated 1625 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1626 String sortOrder) { 1627 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1628 if (c != null) { 1629 startManagingCursor(c); 1630 } 1631 return c; 1632 } 1633 1634 /** 1635 * Wrapper around 1636 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1637 * that gives the resulting {@link Cursor} to call 1638 * {@link #startManagingCursor} so that the activity will manage its 1639 * lifecycle for you. 1640 * 1641 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1642 * or later, consider instead using {@link LoaderManager} instead, available 1643 * via {@link #getLoaderManager()}.</em> 1644 * 1645 * @param uri The URI of the content provider to query. 1646 * @param projection List of columns to return. 1647 * @param selection SQL WHERE clause. 1648 * @param selectionArgs The arguments to selection, if any ?s are pesent 1649 * @param sortOrder SQL ORDER BY clause. 1650 * 1651 * @return The Cursor that was returned by query(). 1652 * 1653 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1654 * @see #startManagingCursor 1655 * 1656 * @deprecated Use {@link CursorLoader} instead. 1657 */ 1658 @Deprecated 1659 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1660 String[] selectionArgs, String sortOrder) { 1661 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1662 if (c != null) { 1663 startManagingCursor(c); 1664 } 1665 return c; 1666 } 1667 1668 /** 1669 * This method allows the activity to take care of managing the given 1670 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1671 * That is, when the activity is stopped it will automatically call 1672 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1673 * it will call {@link Cursor#requery} for you. When the activity is 1674 * destroyed, all managed Cursors will be closed automatically. 1675 * 1676 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1677 * or later, consider instead using {@link LoaderManager} instead, available 1678 * via {@link #getLoaderManager()}.</em> 1679 * 1680 * @param c The Cursor to be managed. 1681 * 1682 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1683 * @see #stopManagingCursor 1684 * 1685 * @deprecated Use {@link CursorLoader} instead. 1686 */ 1687 @Deprecated 1688 public void startManagingCursor(Cursor c) { 1689 synchronized (mManagedCursors) { 1690 mManagedCursors.add(new ManagedCursor(c)); 1691 } 1692 } 1693 1694 /** 1695 * Given a Cursor that was previously given to 1696 * {@link #startManagingCursor}, stop the activity's management of that 1697 * cursor. 1698 * 1699 * @param c The Cursor that was being managed. 1700 * 1701 * @see #startManagingCursor 1702 * 1703 * @deprecated Use {@link CursorLoader} instead. 1704 */ 1705 @Deprecated 1706 public void stopManagingCursor(Cursor c) { 1707 synchronized (mManagedCursors) { 1708 final int N = mManagedCursors.size(); 1709 for (int i=0; i<N; i++) { 1710 ManagedCursor mc = mManagedCursors.get(i); 1711 if (mc.mCursor == c) { 1712 mManagedCursors.remove(i); 1713 break; 1714 } 1715 } 1716 } 1717 } 1718 1719 /** 1720 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 1721 * this is a no-op. 1722 * @hide 1723 */ 1724 @Deprecated 1725 public void setPersistent(boolean isPersistent) { 1726 } 1727 1728 /** 1729 * Finds a view that was identified by the id attribute from the XML that 1730 * was processed in {@link #onCreate}. 1731 * 1732 * @return The view if found or null otherwise. 1733 */ 1734 public View findViewById(int id) { 1735 return getWindow().findViewById(id); 1736 } 1737 1738 /** 1739 * Retrieve a reference to this activity's ActionBar. 1740 * 1741 * @return The Activity's ActionBar, or null if it does not have one. 1742 */ 1743 public ActionBar getActionBar() { 1744 initActionBar(); 1745 return mActionBar; 1746 } 1747 1748 /** 1749 * Creates a new ActionBar, locates the inflated ActionBarView, 1750 * initializes the ActionBar with the view, and sets mActionBar. 1751 */ 1752 private void initActionBar() { 1753 Window window = getWindow(); 1754 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 1755 return; 1756 } 1757 1758 mActionBar = new ActionBarImpl(this); 1759 } 1760 1761 /** 1762 * Set the activity content from a layout resource. The resource will be 1763 * inflated, adding all top-level views to the activity. 1764 * 1765 * @param layoutResID Resource ID to be inflated. 1766 * 1767 * @see #setContentView(android.view.View) 1768 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1769 */ 1770 public void setContentView(int layoutResID) { 1771 getWindow().setContentView(layoutResID); 1772 initActionBar(); 1773 } 1774 1775 /** 1776 * Set the activity content to an explicit view. This view is placed 1777 * directly into the activity's view hierarchy. It can itself be a complex 1778 * view hierarchy. When calling this method, the layout parameters of the 1779 * specified view are ignored. Both the width and the height of the view are 1780 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 1781 * your own layout parameters, invoke 1782 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 1783 * instead. 1784 * 1785 * @param view The desired content to display. 1786 * 1787 * @see #setContentView(int) 1788 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1789 */ 1790 public void setContentView(View view) { 1791 getWindow().setContentView(view); 1792 initActionBar(); 1793 } 1794 1795 /** 1796 * Set the activity content to an explicit view. This view is placed 1797 * directly into the activity's view hierarchy. It can itself be a complex 1798 * view hierarchy. 1799 * 1800 * @param view The desired content to display. 1801 * @param params Layout parameters for the view. 1802 * 1803 * @see #setContentView(android.view.View) 1804 * @see #setContentView(int) 1805 */ 1806 public void setContentView(View view, ViewGroup.LayoutParams params) { 1807 getWindow().setContentView(view, params); 1808 initActionBar(); 1809 } 1810 1811 /** 1812 * Add an additional content view to the activity. Added after any existing 1813 * ones in the activity -- existing views are NOT removed. 1814 * 1815 * @param view The desired content to display. 1816 * @param params Layout parameters for the view. 1817 */ 1818 public void addContentView(View view, ViewGroup.LayoutParams params) { 1819 getWindow().addContentView(view, params); 1820 initActionBar(); 1821 } 1822 1823 /** 1824 * Sets whether this activity is finished when touched outside its window's 1825 * bounds. 1826 */ 1827 public void setFinishOnTouchOutside(boolean finish) { 1828 mWindow.setCloseOnTouchOutside(finish); 1829 } 1830 1831 /** 1832 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1833 * keys. 1834 * 1835 * @see #setDefaultKeyMode 1836 */ 1837 static public final int DEFAULT_KEYS_DISABLE = 0; 1838 /** 1839 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1840 * key handling. 1841 * 1842 * @see #setDefaultKeyMode 1843 */ 1844 static public final int DEFAULT_KEYS_DIALER = 1; 1845 /** 1846 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1847 * default key handling. 1848 * 1849 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1850 * 1851 * @see #setDefaultKeyMode 1852 */ 1853 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1854 /** 1855 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1856 * will start an application-defined search. (If the application or activity does not 1857 * actually define a search, the the keys will be ignored.) 1858 * 1859 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1860 * 1861 * @see #setDefaultKeyMode 1862 */ 1863 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1864 1865 /** 1866 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1867 * will start a global search (typically web search, but some platforms may define alternate 1868 * methods for global search) 1869 * 1870 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1871 * 1872 * @see #setDefaultKeyMode 1873 */ 1874 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1875 1876 /** 1877 * Select the default key handling for this activity. This controls what 1878 * will happen to key events that are not otherwise handled. The default 1879 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1880 * floor. Other modes allow you to launch the dialer 1881 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1882 * menu without requiring the menu key be held down 1883 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1884 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1885 * 1886 * <p>Note that the mode selected here does not impact the default 1887 * handling of system keys, such as the "back" and "menu" keys, and your 1888 * activity and its views always get a first chance to receive and handle 1889 * all application keys. 1890 * 1891 * @param mode The desired default key mode constant. 1892 * 1893 * @see #DEFAULT_KEYS_DISABLE 1894 * @see #DEFAULT_KEYS_DIALER 1895 * @see #DEFAULT_KEYS_SHORTCUT 1896 * @see #DEFAULT_KEYS_SEARCH_LOCAL 1897 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 1898 * @see #onKeyDown 1899 */ 1900 public final void setDefaultKeyMode(int mode) { 1901 mDefaultKeyMode = mode; 1902 1903 // Some modes use a SpannableStringBuilder to track & dispatch input events 1904 // This list must remain in sync with the switch in onKeyDown() 1905 switch (mode) { 1906 case DEFAULT_KEYS_DISABLE: 1907 case DEFAULT_KEYS_SHORTCUT: 1908 mDefaultKeySsb = null; // not used in these modes 1909 break; 1910 case DEFAULT_KEYS_DIALER: 1911 case DEFAULT_KEYS_SEARCH_LOCAL: 1912 case DEFAULT_KEYS_SEARCH_GLOBAL: 1913 mDefaultKeySsb = new SpannableStringBuilder(); 1914 Selection.setSelection(mDefaultKeySsb,0); 1915 break; 1916 default: 1917 throw new IllegalArgumentException(); 1918 } 1919 } 1920 1921 /** 1922 * Called when a key was pressed down and not handled by any of the views 1923 * inside of the activity. So, for example, key presses while the cursor 1924 * is inside a TextView will not trigger the event (unless it is a navigation 1925 * to another object) because TextView handles its own key presses. 1926 * 1927 * <p>If the focused view didn't want this event, this method is called. 1928 * 1929 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 1930 * by calling {@link #onBackPressed()}, though the behavior varies based 1931 * on the application compatibility mode: for 1932 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 1933 * it will set up the dispatch to call {@link #onKeyUp} where the action 1934 * will be performed; for earlier applications, it will perform the 1935 * action immediately in on-down, as those versions of the platform 1936 * behaved. 1937 * 1938 * <p>Other additional default key handling may be performed 1939 * if configured with {@link #setDefaultKeyMode}. 1940 * 1941 * @return Return <code>true</code> to prevent this event from being propagated 1942 * further, or <code>false</code> to indicate that you have not handled 1943 * this event and it should continue to be propagated. 1944 * @see #onKeyUp 1945 * @see android.view.KeyEvent 1946 */ 1947 public boolean onKeyDown(int keyCode, KeyEvent event) { 1948 if (keyCode == KeyEvent.KEYCODE_BACK) { 1949 if (getApplicationInfo().targetSdkVersion 1950 >= Build.VERSION_CODES.ECLAIR) { 1951 event.startTracking(); 1952 } else { 1953 onBackPressed(); 1954 } 1955 return true; 1956 } 1957 1958 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 1959 return false; 1960 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 1961 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 1962 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 1963 return true; 1964 } 1965 return false; 1966 } else { 1967 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 1968 boolean clearSpannable = false; 1969 boolean handled; 1970 if ((event.getRepeatCount() != 0) || event.isSystem()) { 1971 clearSpannable = true; 1972 handled = false; 1973 } else { 1974 handled = TextKeyListener.getInstance().onKeyDown( 1975 null, mDefaultKeySsb, keyCode, event); 1976 if (handled && mDefaultKeySsb.length() > 0) { 1977 // something useable has been typed - dispatch it now. 1978 1979 final String str = mDefaultKeySsb.toString(); 1980 clearSpannable = true; 1981 1982 switch (mDefaultKeyMode) { 1983 case DEFAULT_KEYS_DIALER: 1984 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 1985 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 1986 startActivity(intent); 1987 break; 1988 case DEFAULT_KEYS_SEARCH_LOCAL: 1989 startSearch(str, false, null, false); 1990 break; 1991 case DEFAULT_KEYS_SEARCH_GLOBAL: 1992 startSearch(str, false, null, true); 1993 break; 1994 } 1995 } 1996 } 1997 if (clearSpannable) { 1998 mDefaultKeySsb.clear(); 1999 mDefaultKeySsb.clearSpans(); 2000 Selection.setSelection(mDefaultKeySsb,0); 2001 } 2002 return handled; 2003 } 2004 } 2005 2006 /** 2007 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2008 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2009 * the event). 2010 */ 2011 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2012 return false; 2013 } 2014 2015 /** 2016 * Called when a key was released and not handled by any of the views 2017 * inside of the activity. So, for example, key presses while the cursor 2018 * is inside a TextView will not trigger the event (unless it is a navigation 2019 * to another object) because TextView handles its own key presses. 2020 * 2021 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2022 * and go back. 2023 * 2024 * @return Return <code>true</code> to prevent this event from being propagated 2025 * further, or <code>false</code> to indicate that you have not handled 2026 * this event and it should continue to be propagated. 2027 * @see #onKeyDown 2028 * @see KeyEvent 2029 */ 2030 public boolean onKeyUp(int keyCode, KeyEvent event) { 2031 if (getApplicationInfo().targetSdkVersion 2032 >= Build.VERSION_CODES.ECLAIR) { 2033 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2034 && !event.isCanceled()) { 2035 onBackPressed(); 2036 return true; 2037 } 2038 } 2039 return false; 2040 } 2041 2042 /** 2043 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2044 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2045 * the event). 2046 */ 2047 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2048 return false; 2049 } 2050 2051 /** 2052 * Called when the activity has detected the user's press of the back 2053 * key. The default implementation simply finishes the current activity, 2054 * but you can override this to do whatever you want. 2055 */ 2056 public void onBackPressed() { 2057 if (!mFragments.popBackStackImmediate()) { 2058 finish(); 2059 } 2060 } 2061 2062 /** 2063 * Called when a key shortcut event is not handled by any of the views in the Activity. 2064 * Override this method to implement global key shortcuts for the Activity. 2065 * Key shortcuts can also be implemented by setting the 2066 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2067 * 2068 * @param keyCode The value in event.getKeyCode(). 2069 * @param event Description of the key event. 2070 * @return True if the key shortcut was handled. 2071 */ 2072 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2073 return false; 2074 } 2075 2076 /** 2077 * Called when a touch screen event was not handled by any of the views 2078 * under it. This is most useful to process touch events that happen 2079 * outside of your window bounds, where there is no view to receive it. 2080 * 2081 * @param event The touch screen event being processed. 2082 * 2083 * @return Return true if you have consumed the event, false if you haven't. 2084 * The default implementation always returns false. 2085 */ 2086 public boolean onTouchEvent(MotionEvent event) { 2087 if (mWindow.shouldCloseOnTouch(this, event)) { 2088 finish(); 2089 return true; 2090 } 2091 2092 return false; 2093 } 2094 2095 /** 2096 * Called when the trackball was moved and not handled by any of the 2097 * views inside of the activity. So, for example, if the trackball moves 2098 * while focus is on a button, you will receive a call here because 2099 * buttons do not normally do anything with trackball events. The call 2100 * here happens <em>before</em> trackball movements are converted to 2101 * DPAD key events, which then get sent back to the view hierarchy, and 2102 * will be processed at the point for things like focus navigation. 2103 * 2104 * @param event The trackball event being processed. 2105 * 2106 * @return Return true if you have consumed the event, false if you haven't. 2107 * The default implementation always returns false. 2108 */ 2109 public boolean onTrackballEvent(MotionEvent event) { 2110 return false; 2111 } 2112 2113 /** 2114 * Called when a generic motion event was not handled by any of the 2115 * views inside of the activity. 2116 * <p> 2117 * Generic motion events are dispatched to the focused view to describe 2118 * the motions of input devices such as joysticks. The 2119 * {@link MotionEvent#getSource() source} of the motion event specifies 2120 * the class of input that was received. Implementations of this method 2121 * must examine the bits in the source before processing the event. 2122 * The following code example shows how this is done. 2123 * </p> 2124 * <code> 2125 * public boolean onGenericMotionEvent(MotionEvent event) { 2126 * if ((event.getSource() & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) { 2127 * float x = event.getX(); 2128 * float y = event.getY(); 2129 * // process the joystick motion 2130 * return true; 2131 * } 2132 * return super.onGenericMotionEvent(event); 2133 * } 2134 * </code> 2135 * 2136 * @param event The generic motion event being processed. 2137 * 2138 * @return Return true if you have consumed the event, false if you haven't. 2139 * The default implementation always returns false. 2140 */ 2141 public boolean onGenericMotionEvent(MotionEvent event) { 2142 return false; 2143 } 2144 2145 /** 2146 * Called whenever a key, touch, or trackball event is dispatched to the 2147 * activity. Implement this method if you wish to know that the user has 2148 * interacted with the device in some way while your activity is running. 2149 * This callback and {@link #onUserLeaveHint} are intended to help 2150 * activities manage status bar notifications intelligently; specifically, 2151 * for helping activities determine the proper time to cancel a notfication. 2152 * 2153 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2154 * be accompanied by calls to {@link #onUserInteraction}. This 2155 * ensures that your activity will be told of relevant user activity such 2156 * as pulling down the notification pane and touching an item there. 2157 * 2158 * <p>Note that this callback will be invoked for the touch down action 2159 * that begins a touch gesture, but may not be invoked for the touch-moved 2160 * and touch-up actions that follow. 2161 * 2162 * @see #onUserLeaveHint() 2163 */ 2164 public void onUserInteraction() { 2165 } 2166 2167 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2168 // Update window manager if: we have a view, that view is 2169 // attached to its parent (which will be a RootView), and 2170 // this activity is not embedded. 2171 if (mParent == null) { 2172 View decor = mDecor; 2173 if (decor != null && decor.getParent() != null) { 2174 getWindowManager().updateViewLayout(decor, params); 2175 } 2176 } 2177 } 2178 2179 public void onContentChanged() { 2180 } 2181 2182 /** 2183 * Called when the current {@link Window} of the activity gains or loses 2184 * focus. This is the best indicator of whether this activity is visible 2185 * to the user. The default implementation clears the key tracking 2186 * state, so should always be called. 2187 * 2188 * <p>Note that this provides information about global focus state, which 2189 * is managed independently of activity lifecycles. As such, while focus 2190 * changes will generally have some relation to lifecycle changes (an 2191 * activity that is stopped will not generally get window focus), you 2192 * should not rely on any particular order between the callbacks here and 2193 * those in the other lifecycle methods such as {@link #onResume}. 2194 * 2195 * <p>As a general rule, however, a resumed activity will have window 2196 * focus... unless it has displayed other dialogs or popups that take 2197 * input focus, in which case the activity itself will not have focus 2198 * when the other windows have it. Likewise, the system may display 2199 * system-level windows (such as the status bar notification panel or 2200 * a system alert) which will temporarily take window input focus without 2201 * pausing the foreground activity. 2202 * 2203 * @param hasFocus Whether the window of this activity has focus. 2204 * 2205 * @see #hasWindowFocus() 2206 * @see #onResume 2207 * @see View#onWindowFocusChanged(boolean) 2208 */ 2209 public void onWindowFocusChanged(boolean hasFocus) { 2210 } 2211 2212 /** 2213 * Called when the main window associated with the activity has been 2214 * attached to the window manager. 2215 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2216 * for more information. 2217 * @see View#onAttachedToWindow 2218 */ 2219 public void onAttachedToWindow() { 2220 } 2221 2222 /** 2223 * Called when the main window associated with the activity has been 2224 * detached from the window manager. 2225 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2226 * for more information. 2227 * @see View#onDetachedFromWindow 2228 */ 2229 public void onDetachedFromWindow() { 2230 } 2231 2232 /** 2233 * Returns true if this activity's <em>main</em> window currently has window focus. 2234 * Note that this is not the same as the view itself having focus. 2235 * 2236 * @return True if this activity's main window currently has window focus. 2237 * 2238 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2239 */ 2240 public boolean hasWindowFocus() { 2241 Window w = getWindow(); 2242 if (w != null) { 2243 View d = w.getDecorView(); 2244 if (d != null) { 2245 return d.hasWindowFocus(); 2246 } 2247 } 2248 return false; 2249 } 2250 2251 /** 2252 * Called to process key events. You can override this to intercept all 2253 * key events before they are dispatched to the window. Be sure to call 2254 * this implementation for key events that should be handled normally. 2255 * 2256 * @param event The key event. 2257 * 2258 * @return boolean Return true if this event was consumed. 2259 */ 2260 public boolean dispatchKeyEvent(KeyEvent event) { 2261 onUserInteraction(); 2262 Window win = getWindow(); 2263 if (win.superDispatchKeyEvent(event)) { 2264 return true; 2265 } 2266 View decor = mDecor; 2267 if (decor == null) decor = win.getDecorView(); 2268 return event.dispatch(this, decor != null 2269 ? decor.getKeyDispatcherState() : null, this); 2270 } 2271 2272 /** 2273 * Called to process a key shortcut event. 2274 * You can override this to intercept all key shortcut events before they are 2275 * dispatched to the window. Be sure to call this implementation for key shortcut 2276 * events that should be handled normally. 2277 * 2278 * @param event The key shortcut event. 2279 * @return True if this event was consumed. 2280 */ 2281 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 2282 onUserInteraction(); 2283 if (getWindow().superDispatchKeyShortcutEvent(event)) { 2284 return true; 2285 } 2286 return onKeyShortcut(event.getKeyCode(), event); 2287 } 2288 2289 /** 2290 * Called to process touch screen events. You can override this to 2291 * intercept all touch screen events before they are dispatched to the 2292 * window. Be sure to call this implementation for touch screen events 2293 * that should be handled normally. 2294 * 2295 * @param ev The touch screen event. 2296 * 2297 * @return boolean Return true if this event was consumed. 2298 */ 2299 public boolean dispatchTouchEvent(MotionEvent ev) { 2300 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2301 onUserInteraction(); 2302 } 2303 if (getWindow().superDispatchTouchEvent(ev)) { 2304 return true; 2305 } 2306 return onTouchEvent(ev); 2307 } 2308 2309 /** 2310 * Called to process trackball events. You can override this to 2311 * intercept all trackball events before they are dispatched to the 2312 * window. Be sure to call this implementation for trackball events 2313 * that should be handled normally. 2314 * 2315 * @param ev The trackball event. 2316 * 2317 * @return boolean Return true if this event was consumed. 2318 */ 2319 public boolean dispatchTrackballEvent(MotionEvent ev) { 2320 onUserInteraction(); 2321 if (getWindow().superDispatchTrackballEvent(ev)) { 2322 return true; 2323 } 2324 return onTrackballEvent(ev); 2325 } 2326 2327 /** 2328 * Called to process generic motion events. You can override this to 2329 * intercept all generic motion events before they are dispatched to the 2330 * window. Be sure to call this implementation for generic motion events 2331 * that should be handled normally. 2332 * 2333 * @param ev The generic motion event. 2334 * 2335 * @return boolean Return true if this event was consumed. 2336 */ 2337 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 2338 onUserInteraction(); 2339 if (getWindow().superDispatchGenericMotionEvent(ev)) { 2340 return true; 2341 } 2342 return onGenericMotionEvent(ev); 2343 } 2344 2345 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2346 event.setClassName(getClass().getName()); 2347 event.setPackageName(getPackageName()); 2348 2349 LayoutParams params = getWindow().getAttributes(); 2350 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2351 (params.height == LayoutParams.MATCH_PARENT); 2352 event.setFullScreen(isFullScreen); 2353 2354 CharSequence title = getTitle(); 2355 if (!TextUtils.isEmpty(title)) { 2356 event.getText().add(title); 2357 } 2358 2359 return true; 2360 } 2361 2362 /** 2363 * Default implementation of 2364 * {@link android.view.Window.Callback#onCreatePanelView} 2365 * for activities. This 2366 * simply returns null so that all panel sub-windows will have the default 2367 * menu behavior. 2368 */ 2369 public View onCreatePanelView(int featureId) { 2370 return null; 2371 } 2372 2373 /** 2374 * Default implementation of 2375 * {@link android.view.Window.Callback#onCreatePanelMenu} 2376 * for activities. This calls through to the new 2377 * {@link #onCreateOptionsMenu} method for the 2378 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2379 * so that subclasses of Activity don't need to deal with feature codes. 2380 */ 2381 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2382 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2383 boolean show = onCreateOptionsMenu(menu); 2384 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 2385 return show; 2386 } 2387 return false; 2388 } 2389 2390 /** 2391 * Default implementation of 2392 * {@link android.view.Window.Callback#onPreparePanel} 2393 * for activities. This 2394 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2395 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2396 * panel, so that subclasses of 2397 * Activity don't need to deal with feature codes. 2398 */ 2399 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2400 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2401 boolean goforit = onPrepareOptionsMenu(menu); 2402 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 2403 return goforit && menu.hasVisibleItems(); 2404 } 2405 return true; 2406 } 2407 2408 /** 2409 * {@inheritDoc} 2410 * 2411 * @return The default implementation returns true. 2412 */ 2413 public boolean onMenuOpened(int featureId, Menu menu) { 2414 if (featureId == Window.FEATURE_ACTION_BAR) { 2415 if (mActionBar != null) { 2416 mActionBar.dispatchMenuVisibilityChanged(true); 2417 } else { 2418 Log.e(TAG, "Tried to open action bar menu with no action bar"); 2419 } 2420 } 2421 return true; 2422 } 2423 2424 /** 2425 * Default implementation of 2426 * {@link android.view.Window.Callback#onMenuItemSelected} 2427 * for activities. This calls through to the new 2428 * {@link #onOptionsItemSelected} method for the 2429 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2430 * panel, so that subclasses of 2431 * Activity don't need to deal with feature codes. 2432 */ 2433 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2434 switch (featureId) { 2435 case Window.FEATURE_OPTIONS_PANEL: 2436 // Put event logging here so it gets called even if subclass 2437 // doesn't call through to superclass's implmeentation of each 2438 // of these methods below 2439 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2440 if (onOptionsItemSelected(item)) { 2441 return true; 2442 } 2443 return mFragments.dispatchOptionsItemSelected(item); 2444 2445 case Window.FEATURE_CONTEXT_MENU: 2446 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2447 if (onContextItemSelected(item)) { 2448 return true; 2449 } 2450 return mFragments.dispatchContextItemSelected(item); 2451 2452 default: 2453 return false; 2454 } 2455 } 2456 2457 /** 2458 * Default implementation of 2459 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2460 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2461 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2462 * so that subclasses of Activity don't need to deal with feature codes. 2463 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2464 * {@link #onContextMenuClosed(Menu)} will be called. 2465 */ 2466 public void onPanelClosed(int featureId, Menu menu) { 2467 switch (featureId) { 2468 case Window.FEATURE_OPTIONS_PANEL: 2469 mFragments.dispatchOptionsMenuClosed(menu); 2470 onOptionsMenuClosed(menu); 2471 break; 2472 2473 case Window.FEATURE_CONTEXT_MENU: 2474 onContextMenuClosed(menu); 2475 break; 2476 2477 case Window.FEATURE_ACTION_BAR: 2478 mActionBar.dispatchMenuVisibilityChanged(false); 2479 break; 2480 } 2481 } 2482 2483 /** 2484 * Declare that the options menu has changed, so should be recreated. 2485 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 2486 * time it needs to be displayed. 2487 */ 2488 public void invalidateOptionsMenu() { 2489 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 2490 } 2491 2492 /** 2493 * Initialize the contents of the Activity's standard options menu. You 2494 * should place your menu items in to <var>menu</var>. 2495 * 2496 * <p>This is only called once, the first time the options menu is 2497 * displayed. To update the menu every time it is displayed, see 2498 * {@link #onPrepareOptionsMenu}. 2499 * 2500 * <p>The default implementation populates the menu with standard system 2501 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2502 * they will be correctly ordered with application-defined menu items. 2503 * Deriving classes should always call through to the base implementation. 2504 * 2505 * <p>You can safely hold on to <var>menu</var> (and any items created 2506 * from it), making modifications to it as desired, until the next 2507 * time onCreateOptionsMenu() is called. 2508 * 2509 * <p>When you add items to the menu, you can implement the Activity's 2510 * {@link #onOptionsItemSelected} method to handle them there. 2511 * 2512 * @param menu The options menu in which you place your items. 2513 * 2514 * @return You must return true for the menu to be displayed; 2515 * if you return false it will not be shown. 2516 * 2517 * @see #onPrepareOptionsMenu 2518 * @see #onOptionsItemSelected 2519 */ 2520 public boolean onCreateOptionsMenu(Menu menu) { 2521 if (mParent != null) { 2522 return mParent.onCreateOptionsMenu(menu); 2523 } 2524 return true; 2525 } 2526 2527 /** 2528 * Prepare the Screen's standard options menu to be displayed. This is 2529 * called right before the menu is shown, every time it is shown. You can 2530 * use this method to efficiently enable/disable items or otherwise 2531 * dynamically modify the contents. 2532 * 2533 * <p>The default implementation updates the system menu items based on the 2534 * activity's state. Deriving classes should always call through to the 2535 * base class implementation. 2536 * 2537 * @param menu The options menu as last shown or first initialized by 2538 * onCreateOptionsMenu(). 2539 * 2540 * @return You must return true for the menu to be displayed; 2541 * if you return false it will not be shown. 2542 * 2543 * @see #onCreateOptionsMenu 2544 */ 2545 public boolean onPrepareOptionsMenu(Menu menu) { 2546 if (mParent != null) { 2547 return mParent.onPrepareOptionsMenu(menu); 2548 } 2549 return true; 2550 } 2551 2552 /** 2553 * This hook is called whenever an item in your options menu is selected. 2554 * The default implementation simply returns false to have the normal 2555 * processing happen (calling the item's Runnable or sending a message to 2556 * its Handler as appropriate). You can use this method for any items 2557 * for which you would like to do processing without those other 2558 * facilities. 2559 * 2560 * <p>Derived classes should call through to the base class for it to 2561 * perform the default menu handling. 2562 * 2563 * @param item The menu item that was selected. 2564 * 2565 * @return boolean Return false to allow normal menu processing to 2566 * proceed, true to consume it here. 2567 * 2568 * @see #onCreateOptionsMenu 2569 */ 2570 public boolean onOptionsItemSelected(MenuItem item) { 2571 if (mParent != null) { 2572 return mParent.onOptionsItemSelected(item); 2573 } 2574 return false; 2575 } 2576 2577 /** 2578 * This hook is called whenever the options menu is being closed (either by the user canceling 2579 * the menu with the back/menu button, or when an item is selected). 2580 * 2581 * @param menu The options menu as last shown or first initialized by 2582 * onCreateOptionsMenu(). 2583 */ 2584 public void onOptionsMenuClosed(Menu menu) { 2585 if (mParent != null) { 2586 mParent.onOptionsMenuClosed(menu); 2587 } 2588 } 2589 2590 /** 2591 * Programmatically opens the options menu. If the options menu is already 2592 * open, this method does nothing. 2593 */ 2594 public void openOptionsMenu() { 2595 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2596 } 2597 2598 /** 2599 * Progammatically closes the options menu. If the options menu is already 2600 * closed, this method does nothing. 2601 */ 2602 public void closeOptionsMenu() { 2603 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2604 } 2605 2606 /** 2607 * Called when a context menu for the {@code view} is about to be shown. 2608 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2609 * time the context menu is about to be shown and should be populated for 2610 * the view (or item inside the view for {@link AdapterView} subclasses, 2611 * this can be found in the {@code menuInfo})). 2612 * <p> 2613 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2614 * item has been selected. 2615 * <p> 2616 * It is not safe to hold onto the context menu after this method returns. 2617 * {@inheritDoc} 2618 */ 2619 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2620 } 2621 2622 /** 2623 * Registers a context menu to be shown for the given view (multiple views 2624 * can show the context menu). This method will set the 2625 * {@link OnCreateContextMenuListener} on the view to this activity, so 2626 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2627 * called when it is time to show the context menu. 2628 * 2629 * @see #unregisterForContextMenu(View) 2630 * @param view The view that should show a context menu. 2631 */ 2632 public void registerForContextMenu(View view) { 2633 view.setOnCreateContextMenuListener(this); 2634 } 2635 2636 /** 2637 * Prevents a context menu to be shown for the given view. This method will remove the 2638 * {@link OnCreateContextMenuListener} on the view. 2639 * 2640 * @see #registerForContextMenu(View) 2641 * @param view The view that should stop showing a context menu. 2642 */ 2643 public void unregisterForContextMenu(View view) { 2644 view.setOnCreateContextMenuListener(null); 2645 } 2646 2647 /** 2648 * Programmatically opens the context menu for a particular {@code view}. 2649 * The {@code view} should have been added via 2650 * {@link #registerForContextMenu(View)}. 2651 * 2652 * @param view The view to show the context menu for. 2653 */ 2654 public void openContextMenu(View view) { 2655 view.showContextMenu(); 2656 } 2657 2658 /** 2659 * Programmatically closes the most recently opened context menu, if showing. 2660 */ 2661 public void closeContextMenu() { 2662 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2663 } 2664 2665 /** 2666 * This hook is called whenever an item in a context menu is selected. The 2667 * default implementation simply returns false to have the normal processing 2668 * happen (calling the item's Runnable or sending a message to its Handler 2669 * as appropriate). You can use this method for any items for which you 2670 * would like to do processing without those other facilities. 2671 * <p> 2672 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2673 * View that added this menu item. 2674 * <p> 2675 * Derived classes should call through to the base class for it to perform 2676 * the default menu handling. 2677 * 2678 * @param item The context menu item that was selected. 2679 * @return boolean Return false to allow normal context menu processing to 2680 * proceed, true to consume it here. 2681 */ 2682 public boolean onContextItemSelected(MenuItem item) { 2683 if (mParent != null) { 2684 return mParent.onContextItemSelected(item); 2685 } 2686 return false; 2687 } 2688 2689 /** 2690 * This hook is called whenever the context menu is being closed (either by 2691 * the user canceling the menu with the back/menu button, or when an item is 2692 * selected). 2693 * 2694 * @param menu The context menu that is being closed. 2695 */ 2696 public void onContextMenuClosed(Menu menu) { 2697 if (mParent != null) { 2698 mParent.onContextMenuClosed(menu); 2699 } 2700 } 2701 2702 /** 2703 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2704 */ 2705 @Deprecated 2706 protected Dialog onCreateDialog(int id) { 2707 return null; 2708 } 2709 2710 /** 2711 * Callback for creating dialogs that are managed (saved and restored) for you 2712 * by the activity. The default implementation calls through to 2713 * {@link #onCreateDialog(int)} for compatibility. 2714 * 2715 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2716 * or later, consider instead using a {@link DialogFragment} instead.</em> 2717 * 2718 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2719 * this method the first time, and hang onto it thereafter. Any dialog 2720 * that is created by this method will automatically be saved and restored 2721 * for you, including whether it is showing. 2722 * 2723 * <p>If you would like the activity to manage saving and restoring dialogs 2724 * for you, you should override this method and handle any ids that are 2725 * passed to {@link #showDialog}. 2726 * 2727 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2728 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2729 * 2730 * @param id The id of the dialog. 2731 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2732 * @return The dialog. If you return null, the dialog will not be created. 2733 * 2734 * @see #onPrepareDialog(int, Dialog, Bundle) 2735 * @see #showDialog(int, Bundle) 2736 * @see #dismissDialog(int) 2737 * @see #removeDialog(int) 2738 */ 2739 protected Dialog onCreateDialog(int id, Bundle args) { 2740 return onCreateDialog(id); 2741 } 2742 2743 /** 2744 * @deprecated Old no-arguments version of 2745 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2746 */ 2747 @Deprecated 2748 protected void onPrepareDialog(int id, Dialog dialog) { 2749 dialog.setOwnerActivity(this); 2750 } 2751 2752 /** 2753 * Provides an opportunity to prepare a managed dialog before it is being 2754 * shown. The default implementation calls through to 2755 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2756 * 2757 * <p> 2758 * Override this if you need to update a managed dialog based on the state 2759 * of the application each time it is shown. For example, a time picker 2760 * dialog might want to be updated with the current time. You should call 2761 * through to the superclass's implementation. The default implementation 2762 * will set this Activity as the owner activity on the Dialog. 2763 * 2764 * @param id The id of the managed dialog. 2765 * @param dialog The dialog. 2766 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2767 * @see #onCreateDialog(int, Bundle) 2768 * @see #showDialog(int) 2769 * @see #dismissDialog(int) 2770 * @see #removeDialog(int) 2771 */ 2772 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 2773 onPrepareDialog(id, dialog); 2774 } 2775 2776 /** 2777 * Simple version of {@link #showDialog(int, Bundle)} that does not 2778 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 2779 * with null arguments. 2780 */ 2781 public final void showDialog(int id) { 2782 showDialog(id, null); 2783 } 2784 2785 /** 2786 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 2787 * will be made with the same id the first time this is called for a given 2788 * id. From thereafter, the dialog will be automatically saved and restored. 2789 * 2790 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2791 * or later, consider instead using a {@link DialogFragment} instead.</em> 2792 * 2793 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 2794 * be made to provide an opportunity to do any timely preparation. 2795 * 2796 * @param id The id of the managed dialog. 2797 * @param args Arguments to pass through to the dialog. These will be saved 2798 * and restored for you. Note that if the dialog is already created, 2799 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 2800 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 2801 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 2802 * @return Returns true if the Dialog was created; false is returned if 2803 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 2804 * 2805 * @see Dialog 2806 * @see #onCreateDialog(int, Bundle) 2807 * @see #onPrepareDialog(int, Dialog, Bundle) 2808 * @see #dismissDialog(int) 2809 * @see #removeDialog(int) 2810 */ 2811 public final boolean showDialog(int id, Bundle args) { 2812 if (mManagedDialogs == null) { 2813 mManagedDialogs = new SparseArray<ManagedDialog>(); 2814 } 2815 ManagedDialog md = mManagedDialogs.get(id); 2816 if (md == null) { 2817 md = new ManagedDialog(); 2818 md.mDialog = createDialog(id, null, args); 2819 if (md.mDialog == null) { 2820 return false; 2821 } 2822 mManagedDialogs.put(id, md); 2823 } 2824 2825 md.mArgs = args; 2826 onPrepareDialog(id, md.mDialog, args); 2827 md.mDialog.show(); 2828 return true; 2829 } 2830 2831 /** 2832 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 2833 * 2834 * @param id The id of the managed dialog. 2835 * 2836 * @throws IllegalArgumentException if the id was not previously shown via 2837 * {@link #showDialog(int)}. 2838 * 2839 * @see #onCreateDialog(int, Bundle) 2840 * @see #onPrepareDialog(int, Dialog, Bundle) 2841 * @see #showDialog(int) 2842 * @see #removeDialog(int) 2843 */ 2844 public final void dismissDialog(int id) { 2845 if (mManagedDialogs == null) { 2846 throw missingDialog(id); 2847 } 2848 2849 final ManagedDialog md = mManagedDialogs.get(id); 2850 if (md == null) { 2851 throw missingDialog(id); 2852 } 2853 md.mDialog.dismiss(); 2854 } 2855 2856 /** 2857 * Creates an exception to throw if a user passed in a dialog id that is 2858 * unexpected. 2859 */ 2860 private IllegalArgumentException missingDialog(int id) { 2861 return new IllegalArgumentException("no dialog with id " + id + " was ever " 2862 + "shown via Activity#showDialog"); 2863 } 2864 2865 /** 2866 * Removes any internal references to a dialog managed by this Activity. 2867 * If the dialog is showing, it will dismiss it as part of the clean up. 2868 * 2869 * <p>This can be useful if you know that you will never show a dialog again and 2870 * want to avoid the overhead of saving and restoring it in the future. 2871 * 2872 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 2873 * will not throw an exception if you try to remove an ID that does not 2874 * currently have an associated dialog.</p> 2875 * 2876 * @param id The id of the managed dialog. 2877 * 2878 * @see #onCreateDialog(int, Bundle) 2879 * @see #onPrepareDialog(int, Dialog, Bundle) 2880 * @see #showDialog(int) 2881 * @see #dismissDialog(int) 2882 */ 2883 public final void removeDialog(int id) { 2884 if (mManagedDialogs != null) { 2885 final ManagedDialog md = mManagedDialogs.get(id); 2886 if (md != null) { 2887 md.mDialog.dismiss(); 2888 mManagedDialogs.remove(id); 2889 } 2890 } 2891 } 2892 2893 /** 2894 * This hook is called when the user signals the desire to start a search. 2895 * 2896 * <p>You can use this function as a simple way to launch the search UI, in response to a 2897 * menu item, search button, or other widgets within your activity. Unless overidden, 2898 * calling this function is the same as calling 2899 * {@link #startSearch startSearch(null, false, null, false)}, which launches 2900 * search for the current activity as specified in its manifest, see {@link SearchManager}. 2901 * 2902 * <p>You can override this function to force global search, e.g. in response to a dedicated 2903 * search key, or to block search entirely (by simply returning false). 2904 * 2905 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 2906 * The default implementation always returns {@code true}. 2907 * 2908 * @see android.app.SearchManager 2909 */ 2910 public boolean onSearchRequested() { 2911 startSearch(null, false, null, false); 2912 return true; 2913 } 2914 2915 /** 2916 * This hook is called to launch the search UI. 2917 * 2918 * <p>It is typically called from onSearchRequested(), either directly from 2919 * Activity.onSearchRequested() or from an overridden version in any given 2920 * Activity. If your goal is simply to activate search, it is preferred to call 2921 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 2922 * is to inject specific data such as context data, it is preferred to <i>override</i> 2923 * onSearchRequested(), so that any callers to it will benefit from the override. 2924 * 2925 * @param initialQuery Any non-null non-empty string will be inserted as 2926 * pre-entered text in the search query box. 2927 * @param selectInitialQuery If true, the intial query will be preselected, which means that 2928 * any further typing will replace it. This is useful for cases where an entire pre-formed 2929 * query is being inserted. If false, the selection point will be placed at the end of the 2930 * inserted query. This is useful when the inserted query is text that the user entered, 2931 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 2932 * if initialQuery is a non-empty string.</i> 2933 * @param appSearchData An application can insert application-specific 2934 * context here, in order to improve quality or specificity of its own 2935 * searches. This data will be returned with SEARCH intent(s). Null if 2936 * no extra data is required. 2937 * @param globalSearch If false, this will only launch the search that has been specifically 2938 * defined by the application (which is usually defined as a local search). If no default 2939 * search is defined in the current application or activity, global search will be launched. 2940 * If true, this will always launch a platform-global (e.g. web-based) search instead. 2941 * 2942 * @see android.app.SearchManager 2943 * @see #onSearchRequested 2944 */ 2945 public void startSearch(String initialQuery, boolean selectInitialQuery, 2946 Bundle appSearchData, boolean globalSearch) { 2947 ensureSearchManager(); 2948 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 2949 appSearchData, globalSearch); 2950 } 2951 2952 /** 2953 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 2954 * the search dialog. Made available for testing purposes. 2955 * 2956 * @param query The query to trigger. If empty, the request will be ignored. 2957 * @param appSearchData An application can insert application-specific 2958 * context here, in order to improve quality or specificity of its own 2959 * searches. This data will be returned with SEARCH intent(s). Null if 2960 * no extra data is required. 2961 */ 2962 public void triggerSearch(String query, Bundle appSearchData) { 2963 ensureSearchManager(); 2964 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 2965 } 2966 2967 /** 2968 * Request that key events come to this activity. Use this if your 2969 * activity has no views with focus, but the activity still wants 2970 * a chance to process key events. 2971 * 2972 * @see android.view.Window#takeKeyEvents 2973 */ 2974 public void takeKeyEvents(boolean get) { 2975 getWindow().takeKeyEvents(get); 2976 } 2977 2978 /** 2979 * Enable extended window features. This is a convenience for calling 2980 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 2981 * 2982 * @param featureId The desired feature as defined in 2983 * {@link android.view.Window}. 2984 * @return Returns true if the requested feature is supported and now 2985 * enabled. 2986 * 2987 * @see android.view.Window#requestFeature 2988 */ 2989 public final boolean requestWindowFeature(int featureId) { 2990 return getWindow().requestFeature(featureId); 2991 } 2992 2993 /** 2994 * Convenience for calling 2995 * {@link android.view.Window#setFeatureDrawableResource}. 2996 */ 2997 public final void setFeatureDrawableResource(int featureId, int resId) { 2998 getWindow().setFeatureDrawableResource(featureId, resId); 2999 } 3000 3001 /** 3002 * Convenience for calling 3003 * {@link android.view.Window#setFeatureDrawableUri}. 3004 */ 3005 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3006 getWindow().setFeatureDrawableUri(featureId, uri); 3007 } 3008 3009 /** 3010 * Convenience for calling 3011 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3012 */ 3013 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3014 getWindow().setFeatureDrawable(featureId, drawable); 3015 } 3016 3017 /** 3018 * Convenience for calling 3019 * {@link android.view.Window#setFeatureDrawableAlpha}. 3020 */ 3021 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3022 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3023 } 3024 3025 /** 3026 * Convenience for calling 3027 * {@link android.view.Window#getLayoutInflater}. 3028 */ 3029 public LayoutInflater getLayoutInflater() { 3030 return getWindow().getLayoutInflater(); 3031 } 3032 3033 /** 3034 * Returns a {@link MenuInflater} with this context. 3035 */ 3036 public MenuInflater getMenuInflater() { 3037 return new MenuInflater(this); 3038 } 3039 3040 @Override 3041 protected void onApplyThemeResource(Resources.Theme theme, int resid, 3042 boolean first) { 3043 if (mParent == null) { 3044 super.onApplyThemeResource(theme, resid, first); 3045 } else { 3046 try { 3047 theme.setTo(mParent.getTheme()); 3048 } catch (Exception e) { 3049 // Empty 3050 } 3051 theme.applyStyle(resid, false); 3052 } 3053 } 3054 3055 /** 3056 * Launch an activity for which you would like a result when it finished. 3057 * When this activity exits, your 3058 * onActivityResult() method will be called with the given requestCode. 3059 * Using a negative requestCode is the same as calling 3060 * {@link #startActivity} (the activity is not launched as a sub-activity). 3061 * 3062 * <p>Note that this method should only be used with Intent protocols 3063 * that are defined to return a result. In other protocols (such as 3064 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3065 * not get the result when you expect. For example, if the activity you 3066 * are launching uses the singleTask launch mode, it will not run in your 3067 * task and thus you will immediately receive a cancel result. 3068 * 3069 * <p>As a special case, if you call startActivityForResult() with a requestCode 3070 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3071 * activity, then your window will not be displayed until a result is 3072 * returned back from the started activity. This is to avoid visible 3073 * flickering when redirecting to another activity. 3074 * 3075 * <p>This method throws {@link android.content.ActivityNotFoundException} 3076 * if there was no Activity found to run the given Intent. 3077 * 3078 * @param intent The intent to start. 3079 * @param requestCode If >= 0, this code will be returned in 3080 * onActivityResult() when the activity exits. 3081 * 3082 * @throws android.content.ActivityNotFoundException 3083 * 3084 * @see #startActivity 3085 */ 3086 public void startActivityForResult(Intent intent, int requestCode) { 3087 if (mParent == null) { 3088 Instrumentation.ActivityResult ar = 3089 mInstrumentation.execStartActivity( 3090 this, mMainThread.getApplicationThread(), mToken, this, 3091 intent, requestCode); 3092 if (ar != null) { 3093 mMainThread.sendActivityResult( 3094 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3095 ar.getResultData()); 3096 } 3097 if (requestCode >= 0) { 3098 // If this start is requesting a result, we can avoid making 3099 // the activity visible until the result is received. Setting 3100 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3101 // activity hidden during this time, to avoid flickering. 3102 // This can only be done when a result is requested because 3103 // that guarantees we will get information back when the 3104 // activity is finished, no matter what happens to it. 3105 mStartedActivity = true; 3106 } 3107 } else { 3108 mParent.startActivityFromChild(this, intent, requestCode); 3109 } 3110 } 3111 3112 /** 3113 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3114 * to use a IntentSender to describe the activity to be started. If 3115 * the IntentSender is for an activity, that activity will be started 3116 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3117 * here; otherwise, its associated action will be executed (such as 3118 * sending a broadcast) as if you had called 3119 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3120 * 3121 * @param intent The IntentSender to launch. 3122 * @param requestCode If >= 0, this code will be returned in 3123 * onActivityResult() when the activity exits. 3124 * @param fillInIntent If non-null, this will be provided as the 3125 * intent parameter to {@link IntentSender#sendIntent}. 3126 * @param flagsMask Intent flags in the original IntentSender that you 3127 * would like to change. 3128 * @param flagsValues Desired values for any bits set in 3129 * <var>flagsMask</var> 3130 * @param extraFlags Always set to 0. 3131 */ 3132 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3133 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3134 throws IntentSender.SendIntentException { 3135 if (mParent == null) { 3136 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3137 flagsMask, flagsValues, this); 3138 } else { 3139 mParent.startIntentSenderFromChild(this, intent, requestCode, 3140 fillInIntent, flagsMask, flagsValues, extraFlags); 3141 } 3142 } 3143 3144 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3145 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity) 3146 throws IntentSender.SendIntentException { 3147 try { 3148 String resolvedType = null; 3149 if (fillInIntent != null) { 3150 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3151 } 3152 int result = ActivityManagerNative.getDefault() 3153 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3154 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3155 requestCode, flagsMask, flagsValues); 3156 if (result == IActivityManager.START_CANCELED) { 3157 throw new IntentSender.SendIntentException(); 3158 } 3159 Instrumentation.checkStartActivityResult(result, null); 3160 } catch (RemoteException e) { 3161 } 3162 if (requestCode >= 0) { 3163 // If this start is requesting a result, we can avoid making 3164 // the activity visible until the result is received. Setting 3165 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3166 // activity hidden during this time, to avoid flickering. 3167 // This can only be done when a result is requested because 3168 // that guarantees we will get information back when the 3169 // activity is finished, no matter what happens to it. 3170 mStartedActivity = true; 3171 } 3172 } 3173 3174 /** 3175 * Launch a new activity. You will not receive any information about when 3176 * the activity exits. This implementation overrides the base version, 3177 * providing information about 3178 * the activity performing the launch. Because of this additional 3179 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3180 * required; if not specified, the new activity will be added to the 3181 * task of the caller. 3182 * 3183 * <p>This method throws {@link android.content.ActivityNotFoundException} 3184 * if there was no Activity found to run the given Intent. 3185 * 3186 * @param intent The intent to start. 3187 * 3188 * @throws android.content.ActivityNotFoundException 3189 * 3190 * @see #startActivityForResult 3191 */ 3192 @Override 3193 public void startActivity(Intent intent) { 3194 startActivityForResult(intent, -1); 3195 } 3196 3197 /** 3198 * Launch a new activity. You will not receive any information about when 3199 * the activity exits. This implementation overrides the base version, 3200 * providing information about 3201 * the activity performing the launch. Because of this additional 3202 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3203 * required; if not specified, the new activity will be added to the 3204 * task of the caller. 3205 * 3206 * <p>This method throws {@link android.content.ActivityNotFoundException} 3207 * if there was no Activity found to run the given Intent. 3208 * 3209 * @param intents The intents to start. 3210 * 3211 * @throws android.content.ActivityNotFoundException 3212 * 3213 * @see #startActivityForResult 3214 */ 3215 @Override 3216 public void startActivities(Intent[] intents) { 3217 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 3218 mToken, this, intents); 3219 } 3220 3221 /** 3222 * Like {@link #startActivity(Intent)}, but taking a IntentSender 3223 * to start; see 3224 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3225 * for more information. 3226 * 3227 * @param intent The IntentSender to launch. 3228 * @param fillInIntent If non-null, this will be provided as the 3229 * intent parameter to {@link IntentSender#sendIntent}. 3230 * @param flagsMask Intent flags in the original IntentSender that you 3231 * would like to change. 3232 * @param flagsValues Desired values for any bits set in 3233 * <var>flagsMask</var> 3234 * @param extraFlags Always set to 0. 3235 */ 3236 public void startIntentSender(IntentSender intent, 3237 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3238 throws IntentSender.SendIntentException { 3239 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3240 flagsValues, extraFlags); 3241 } 3242 3243 /** 3244 * A special variation to launch an activity only if a new activity 3245 * instance is needed to handle the given Intent. In other words, this is 3246 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3247 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3248 * singleTask or singleTop 3249 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3250 * and the activity 3251 * that handles <var>intent</var> is the same as your currently running 3252 * activity, then a new instance is not needed. In this case, instead of 3253 * the normal behavior of calling {@link #onNewIntent} this function will 3254 * return and you can handle the Intent yourself. 3255 * 3256 * <p>This function can only be called from a top-level activity; if it is 3257 * called from a child activity, a runtime exception will be thrown. 3258 * 3259 * @param intent The intent to start. 3260 * @param requestCode If >= 0, this code will be returned in 3261 * onActivityResult() when the activity exits, as described in 3262 * {@link #startActivityForResult}. 3263 * 3264 * @return If a new activity was launched then true is returned; otherwise 3265 * false is returned and you must handle the Intent yourself. 3266 * 3267 * @see #startActivity 3268 * @see #startActivityForResult 3269 */ 3270 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3271 if (mParent == null) { 3272 int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; 3273 try { 3274 result = ActivityManagerNative.getDefault() 3275 .startActivity(mMainThread.getApplicationThread(), 3276 intent, intent.resolveTypeIfNeeded( 3277 getContentResolver()), 3278 null, 0, 3279 mToken, mEmbeddedID, requestCode, true, false); 3280 } catch (RemoteException e) { 3281 // Empty 3282 } 3283 3284 Instrumentation.checkStartActivityResult(result, intent); 3285 3286 if (requestCode >= 0) { 3287 // If this start is requesting a result, we can avoid making 3288 // the activity visible until the result is received. Setting 3289 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3290 // activity hidden during this time, to avoid flickering. 3291 // This can only be done when a result is requested because 3292 // that guarantees we will get information back when the 3293 // activity is finished, no matter what happens to it. 3294 mStartedActivity = true; 3295 } 3296 return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; 3297 } 3298 3299 throw new UnsupportedOperationException( 3300 "startActivityIfNeeded can only be called from a top-level activity"); 3301 } 3302 3303 /** 3304 * Special version of starting an activity, for use when you are replacing 3305 * other activity components. You can use this to hand the Intent off 3306 * to the next Activity that can handle it. You typically call this in 3307 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3308 * 3309 * @param intent The intent to dispatch to the next activity. For 3310 * correct behavior, this must be the same as the Intent that started 3311 * your own activity; the only changes you can make are to the extras 3312 * inside of it. 3313 * 3314 * @return Returns a boolean indicating whether there was another Activity 3315 * to start: true if there was a next activity to start, false if there 3316 * wasn't. In general, if true is returned you will then want to call 3317 * finish() on yourself. 3318 */ 3319 public boolean startNextMatchingActivity(Intent intent) { 3320 if (mParent == null) { 3321 try { 3322 return ActivityManagerNative.getDefault() 3323 .startNextMatchingActivity(mToken, intent); 3324 } catch (RemoteException e) { 3325 // Empty 3326 } 3327 return false; 3328 } 3329 3330 throw new UnsupportedOperationException( 3331 "startNextMatchingActivity can only be called from a top-level activity"); 3332 } 3333 3334 /** 3335 * This is called when a child activity of this one calls its 3336 * {@link #startActivity} or {@link #startActivityForResult} method. 3337 * 3338 * <p>This method throws {@link android.content.ActivityNotFoundException} 3339 * if there was no Activity found to run the given Intent. 3340 * 3341 * @param child The activity making the call. 3342 * @param intent The intent to start. 3343 * @param requestCode Reply request code. < 0 if reply is not requested. 3344 * 3345 * @throws android.content.ActivityNotFoundException 3346 * 3347 * @see #startActivity 3348 * @see #startActivityForResult 3349 */ 3350 public void startActivityFromChild(Activity child, Intent intent, 3351 int requestCode) { 3352 Instrumentation.ActivityResult ar = 3353 mInstrumentation.execStartActivity( 3354 this, mMainThread.getApplicationThread(), mToken, child, 3355 intent, requestCode); 3356 if (ar != null) { 3357 mMainThread.sendActivityResult( 3358 mToken, child.mEmbeddedID, requestCode, 3359 ar.getResultCode(), ar.getResultData()); 3360 } 3361 } 3362 3363 /** 3364 * This is called when a Fragment in this activity calls its 3365 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 3366 * method. 3367 * 3368 * <p>This method throws {@link android.content.ActivityNotFoundException} 3369 * if there was no Activity found to run the given Intent. 3370 * 3371 * @param fragment The fragment making the call. 3372 * @param intent The intent to start. 3373 * @param requestCode Reply request code. < 0 if reply is not requested. 3374 * 3375 * @throws android.content.ActivityNotFoundException 3376 * 3377 * @see Fragment#startActivity 3378 * @see Fragment#startActivityForResult 3379 */ 3380 public void startActivityFromFragment(Fragment fragment, Intent intent, 3381 int requestCode) { 3382 Instrumentation.ActivityResult ar = 3383 mInstrumentation.execStartActivity( 3384 this, mMainThread.getApplicationThread(), mToken, fragment, 3385 intent, requestCode); 3386 if (ar != null) { 3387 mMainThread.sendActivityResult( 3388 mToken, fragment.mWho, requestCode, 3389 ar.getResultCode(), ar.getResultData()); 3390 } 3391 } 3392 3393 /** 3394 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3395 * taking a IntentSender; see 3396 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3397 * for more information. 3398 */ 3399 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3400 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3401 int extraFlags) 3402 throws IntentSender.SendIntentException { 3403 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3404 flagsMask, flagsValues, child); 3405 } 3406 3407 /** 3408 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3409 * or {@link #finish} to specify an explicit transition animation to 3410 * perform next. 3411 * @param enterAnim A resource ID of the animation resource to use for 3412 * the incoming activity. Use 0 for no animation. 3413 * @param exitAnim A resource ID of the animation resource to use for 3414 * the outgoing activity. Use 0 for no animation. 3415 */ 3416 public void overridePendingTransition(int enterAnim, int exitAnim) { 3417 try { 3418 ActivityManagerNative.getDefault().overridePendingTransition( 3419 mToken, getPackageName(), enterAnim, exitAnim); 3420 } catch (RemoteException e) { 3421 } 3422 } 3423 3424 /** 3425 * Call this to set the result that your activity will return to its 3426 * caller. 3427 * 3428 * @param resultCode The result code to propagate back to the originating 3429 * activity, often RESULT_CANCELED or RESULT_OK 3430 * 3431 * @see #RESULT_CANCELED 3432 * @see #RESULT_OK 3433 * @see #RESULT_FIRST_USER 3434 * @see #setResult(int, Intent) 3435 */ 3436 public final void setResult(int resultCode) { 3437 synchronized (this) { 3438 mResultCode = resultCode; 3439 mResultData = null; 3440 } 3441 } 3442 3443 /** 3444 * Call this to set the result that your activity will return to its 3445 * caller. 3446 * 3447 * @param resultCode The result code to propagate back to the originating 3448 * activity, often RESULT_CANCELED or RESULT_OK 3449 * @param data The data to propagate back to the originating activity. 3450 * 3451 * @see #RESULT_CANCELED 3452 * @see #RESULT_OK 3453 * @see #RESULT_FIRST_USER 3454 * @see #setResult(int) 3455 */ 3456 public final void setResult(int resultCode, Intent data) { 3457 synchronized (this) { 3458 mResultCode = resultCode; 3459 mResultData = data; 3460 } 3461 } 3462 3463 /** 3464 * Return the name of the package that invoked this activity. This is who 3465 * the data in {@link #setResult setResult()} will be sent to. You can 3466 * use this information to validate that the recipient is allowed to 3467 * receive the data. 3468 * 3469 * <p>Note: if the calling activity is not expecting a result (that is it 3470 * did not use the {@link #startActivityForResult} 3471 * form that includes a request code), then the calling package will be 3472 * null. 3473 * 3474 * @return The package of the activity that will receive your 3475 * reply, or null if none. 3476 */ 3477 public String getCallingPackage() { 3478 try { 3479 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 3480 } catch (RemoteException e) { 3481 return null; 3482 } 3483 } 3484 3485 /** 3486 * Return the name of the activity that invoked this activity. This is 3487 * who the data in {@link #setResult setResult()} will be sent to. You 3488 * can use this information to validate that the recipient is allowed to 3489 * receive the data. 3490 * 3491 * <p>Note: if the calling activity is not expecting a result (that is it 3492 * did not use the {@link #startActivityForResult} 3493 * form that includes a request code), then the calling package will be 3494 * null. 3495 * 3496 * @return String The full name of the activity that will receive your 3497 * reply, or null if none. 3498 */ 3499 public ComponentName getCallingActivity() { 3500 try { 3501 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 3502 } catch (RemoteException e) { 3503 return null; 3504 } 3505 } 3506 3507 /** 3508 * Control whether this activity's main window is visible. This is intended 3509 * only for the special case of an activity that is not going to show a 3510 * UI itself, but can't just finish prior to onResume() because it needs 3511 * to wait for a service binding or such. Setting this to false allows 3512 * you to prevent your UI from being shown during that time. 3513 * 3514 * <p>The default value for this is taken from the 3515 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 3516 */ 3517 public void setVisible(boolean visible) { 3518 if (mVisibleFromClient != visible) { 3519 mVisibleFromClient = visible; 3520 if (mVisibleFromServer) { 3521 if (visible) makeVisible(); 3522 else mDecor.setVisibility(View.INVISIBLE); 3523 } 3524 } 3525 } 3526 3527 void makeVisible() { 3528 if (!mWindowAdded) { 3529 ViewManager wm = getWindowManager(); 3530 wm.addView(mDecor, getWindow().getAttributes()); 3531 mWindowAdded = true; 3532 } 3533 mDecor.setVisibility(View.VISIBLE); 3534 } 3535 3536 /** 3537 * Check to see whether this activity is in the process of finishing, 3538 * either because you called {@link #finish} on it or someone else 3539 * has requested that it finished. This is often used in 3540 * {@link #onPause} to determine whether the activity is simply pausing or 3541 * completely finishing. 3542 * 3543 * @return If the activity is finishing, returns true; else returns false. 3544 * 3545 * @see #finish 3546 */ 3547 public boolean isFinishing() { 3548 return mFinished; 3549 } 3550 3551 /** 3552 * Check to see whether this activity is in the process of being destroyed in order to be 3553 * recreated with a new configuration. This is often used in 3554 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 3555 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 3556 * 3557 * @return If the activity is being torn down in order to be recreated with a new configuration, 3558 * returns true; else returns false. 3559 */ 3560 public boolean isChangingConfigurations() { 3561 return mChangingConfigurations; 3562 } 3563 3564 /** 3565 * Cause this Activity to be recreated with a new instance. This results 3566 * in essentially the same flow as when the Activity is created due to 3567 * a configuration change -- the current instance will go through its 3568 * lifecycle to {@link #onDestroy} and a new instance then created after it. 3569 */ 3570 public void recreate() { 3571 if (mParent != null) { 3572 throw new IllegalStateException("Can only be called on top-level activity"); 3573 } 3574 if (Looper.myLooper() != mMainThread.getLooper()) { 3575 throw new IllegalStateException("Must be called from main thread"); 3576 } 3577 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false); 3578 } 3579 3580 /** 3581 * Call this when your activity is done and should be closed. The 3582 * ActivityResult is propagated back to whoever launched you via 3583 * onActivityResult(). 3584 */ 3585 public void finish() { 3586 if (mParent == null) { 3587 int resultCode; 3588 Intent resultData; 3589 synchronized (this) { 3590 resultCode = mResultCode; 3591 resultData = mResultData; 3592 } 3593 if (Config.LOGV) Log.v(TAG, "Finishing self: token=" + mToken); 3594 try { 3595 if (ActivityManagerNative.getDefault() 3596 .finishActivity(mToken, resultCode, resultData)) { 3597 mFinished = true; 3598 } 3599 } catch (RemoteException e) { 3600 // Empty 3601 } 3602 } else { 3603 mParent.finishFromChild(this); 3604 } 3605 } 3606 3607 /** 3608 * This is called when a child activity of this one calls its 3609 * {@link #finish} method. The default implementation simply calls 3610 * finish() on this activity (the parent), finishing the entire group. 3611 * 3612 * @param child The activity making the call. 3613 * 3614 * @see #finish 3615 */ 3616 public void finishFromChild(Activity child) { 3617 finish(); 3618 } 3619 3620 /** 3621 * Force finish another activity that you had previously started with 3622 * {@link #startActivityForResult}. 3623 * 3624 * @param requestCode The request code of the activity that you had 3625 * given to startActivityForResult(). If there are multiple 3626 * activities started with this request code, they 3627 * will all be finished. 3628 */ 3629 public void finishActivity(int requestCode) { 3630 if (mParent == null) { 3631 try { 3632 ActivityManagerNative.getDefault() 3633 .finishSubActivity(mToken, mEmbeddedID, requestCode); 3634 } catch (RemoteException e) { 3635 // Empty 3636 } 3637 } else { 3638 mParent.finishActivityFromChild(this, requestCode); 3639 } 3640 } 3641 3642 /** 3643 * This is called when a child activity of this one calls its 3644 * finishActivity(). 3645 * 3646 * @param child The activity making the call. 3647 * @param requestCode Request code that had been used to start the 3648 * activity. 3649 */ 3650 public void finishActivityFromChild(Activity child, int requestCode) { 3651 try { 3652 ActivityManagerNative.getDefault() 3653 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 3654 } catch (RemoteException e) { 3655 // Empty 3656 } 3657 } 3658 3659 /** 3660 * Called when an activity you launched exits, giving you the requestCode 3661 * you started it with, the resultCode it returned, and any additional 3662 * data from it. The <var>resultCode</var> will be 3663 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 3664 * didn't return any result, or crashed during its operation. 3665 * 3666 * <p>You will receive this call immediately before onResume() when your 3667 * activity is re-starting. 3668 * 3669 * @param requestCode The integer request code originally supplied to 3670 * startActivityForResult(), allowing you to identify who this 3671 * result came from. 3672 * @param resultCode The integer result code returned by the child activity 3673 * through its setResult(). 3674 * @param data An Intent, which can return result data to the caller 3675 * (various data can be attached to Intent "extras"). 3676 * 3677 * @see #startActivityForResult 3678 * @see #createPendingResult 3679 * @see #setResult(int) 3680 */ 3681 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 3682 } 3683 3684 /** 3685 * Create a new PendingIntent object which you can hand to others 3686 * for them to use to send result data back to your 3687 * {@link #onActivityResult} callback. The created object will be either 3688 * one-shot (becoming invalid after a result is sent back) or multiple 3689 * (allowing any number of results to be sent through it). 3690 * 3691 * @param requestCode Private request code for the sender that will be 3692 * associated with the result data when it is returned. The sender can not 3693 * modify this value, allowing you to identify incoming results. 3694 * @param data Default data to supply in the result, which may be modified 3695 * by the sender. 3696 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 3697 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 3698 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 3699 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 3700 * or any of the flags as supported by 3701 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 3702 * of the intent that can be supplied when the actual send happens. 3703 * 3704 * @return Returns an existing or new PendingIntent matching the given 3705 * parameters. May return null only if 3706 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 3707 * supplied. 3708 * 3709 * @see PendingIntent 3710 */ 3711 public PendingIntent createPendingResult(int requestCode, Intent data, 3712 int flags) { 3713 String packageName = getPackageName(); 3714 try { 3715 IIntentSender target = 3716 ActivityManagerNative.getDefault().getIntentSender( 3717 IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 3718 mParent == null ? mToken : mParent.mToken, 3719 mEmbeddedID, requestCode, new Intent[] { data }, null, flags); 3720 return target != null ? new PendingIntent(target) : null; 3721 } catch (RemoteException e) { 3722 // Empty 3723 } 3724 return null; 3725 } 3726 3727 /** 3728 * Change the desired orientation of this activity. If the activity 3729 * is currently in the foreground or otherwise impacting the screen 3730 * orientation, the screen will immediately be changed (possibly causing 3731 * the activity to be restarted). Otherwise, this will be used the next 3732 * time the activity is visible. 3733 * 3734 * @param requestedOrientation An orientation constant as used in 3735 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3736 */ 3737 public void setRequestedOrientation(int requestedOrientation) { 3738 if (mParent == null) { 3739 try { 3740 ActivityManagerNative.getDefault().setRequestedOrientation( 3741 mToken, requestedOrientation); 3742 } catch (RemoteException e) { 3743 // Empty 3744 } 3745 } else { 3746 mParent.setRequestedOrientation(requestedOrientation); 3747 } 3748 } 3749 3750 /** 3751 * Return the current requested orientation of the activity. This will 3752 * either be the orientation requested in its component's manifest, or 3753 * the last requested orientation given to 3754 * {@link #setRequestedOrientation(int)}. 3755 * 3756 * @return Returns an orientation constant as used in 3757 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3758 */ 3759 public int getRequestedOrientation() { 3760 if (mParent == null) { 3761 try { 3762 return ActivityManagerNative.getDefault() 3763 .getRequestedOrientation(mToken); 3764 } catch (RemoteException e) { 3765 // Empty 3766 } 3767 } else { 3768 return mParent.getRequestedOrientation(); 3769 } 3770 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 3771 } 3772 3773 /** 3774 * Return the identifier of the task this activity is in. This identifier 3775 * will remain the same for the lifetime of the activity. 3776 * 3777 * @return Task identifier, an opaque integer. 3778 */ 3779 public int getTaskId() { 3780 try { 3781 return ActivityManagerNative.getDefault() 3782 .getTaskForActivity(mToken, false); 3783 } catch (RemoteException e) { 3784 return -1; 3785 } 3786 } 3787 3788 /** 3789 * Return whether this activity is the root of a task. The root is the 3790 * first activity in a task. 3791 * 3792 * @return True if this is the root activity, else false. 3793 */ 3794 public boolean isTaskRoot() { 3795 try { 3796 return ActivityManagerNative.getDefault() 3797 .getTaskForActivity(mToken, true) >= 0; 3798 } catch (RemoteException e) { 3799 return false; 3800 } 3801 } 3802 3803 /** 3804 * Move the task containing this activity to the back of the activity 3805 * stack. The activity's order within the task is unchanged. 3806 * 3807 * @param nonRoot If false then this only works if the activity is the root 3808 * of a task; if true it will work for any activity in 3809 * a task. 3810 * 3811 * @return If the task was moved (or it was already at the 3812 * back) true is returned, else false. 3813 */ 3814 public boolean moveTaskToBack(boolean nonRoot) { 3815 try { 3816 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 3817 mToken, nonRoot); 3818 } catch (RemoteException e) { 3819 // Empty 3820 } 3821 return false; 3822 } 3823 3824 /** 3825 * Returns class name for this activity with the package prefix removed. 3826 * This is the default name used to read and write settings. 3827 * 3828 * @return The local class name. 3829 */ 3830 public String getLocalClassName() { 3831 final String pkg = getPackageName(); 3832 final String cls = mComponent.getClassName(); 3833 int packageLen = pkg.length(); 3834 if (!cls.startsWith(pkg) || cls.length() <= packageLen 3835 || cls.charAt(packageLen) != '.') { 3836 return cls; 3837 } 3838 return cls.substring(packageLen+1); 3839 } 3840 3841 /** 3842 * Returns complete component name of this activity. 3843 * 3844 * @return Returns the complete component name for this activity 3845 */ 3846 public ComponentName getComponentName() 3847 { 3848 return mComponent; 3849 } 3850 3851 /** 3852 * Retrieve a {@link SharedPreferences} object for accessing preferences 3853 * that are private to this activity. This simply calls the underlying 3854 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 3855 * class name as the preferences name. 3856 * 3857 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 3858 * operation, {@link #MODE_WORLD_READABLE} and 3859 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 3860 * 3861 * @return Returns the single SharedPreferences instance that can be used 3862 * to retrieve and modify the preference values. 3863 */ 3864 public SharedPreferences getPreferences(int mode) { 3865 return getSharedPreferences(getLocalClassName(), mode); 3866 } 3867 3868 private void ensureSearchManager() { 3869 if (mSearchManager != null) { 3870 return; 3871 } 3872 3873 mSearchManager = new SearchManager(this, null); 3874 } 3875 3876 @Override 3877 public Object getSystemService(String name) { 3878 if (getBaseContext() == null) { 3879 throw new IllegalStateException( 3880 "System services not available to Activities before onCreate()"); 3881 } 3882 3883 if (WINDOW_SERVICE.equals(name)) { 3884 return mWindowManager; 3885 } else if (SEARCH_SERVICE.equals(name)) { 3886 ensureSearchManager(); 3887 return mSearchManager; 3888 } 3889 return super.getSystemService(name); 3890 } 3891 3892 /** 3893 * Change the title associated with this activity. If this is a 3894 * top-level activity, the title for its window will change. If it 3895 * is an embedded activity, the parent can do whatever it wants 3896 * with it. 3897 */ 3898 public void setTitle(CharSequence title) { 3899 mTitle = title; 3900 onTitleChanged(title, mTitleColor); 3901 3902 if (mParent != null) { 3903 mParent.onChildTitleChanged(this, title); 3904 } 3905 } 3906 3907 /** 3908 * Change the title associated with this activity. If this is a 3909 * top-level activity, the title for its window will change. If it 3910 * is an embedded activity, the parent can do whatever it wants 3911 * with it. 3912 */ 3913 public void setTitle(int titleId) { 3914 setTitle(getText(titleId)); 3915 } 3916 3917 public void setTitleColor(int textColor) { 3918 mTitleColor = textColor; 3919 onTitleChanged(mTitle, textColor); 3920 } 3921 3922 public final CharSequence getTitle() { 3923 return mTitle; 3924 } 3925 3926 public final int getTitleColor() { 3927 return mTitleColor; 3928 } 3929 3930 protected void onTitleChanged(CharSequence title, int color) { 3931 if (mTitleReady) { 3932 final Window win = getWindow(); 3933 if (win != null) { 3934 win.setTitle(title); 3935 if (color != 0) { 3936 win.setTitleColor(color); 3937 } 3938 } 3939 } 3940 } 3941 3942 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 3943 } 3944 3945 /** 3946 * Sets the visibility of the progress bar in the title. 3947 * <p> 3948 * In order for the progress bar to be shown, the feature must be requested 3949 * via {@link #requestWindowFeature(int)}. 3950 * 3951 * @param visible Whether to show the progress bars in the title. 3952 */ 3953 public final void setProgressBarVisibility(boolean visible) { 3954 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 3955 Window.PROGRESS_VISIBILITY_OFF); 3956 } 3957 3958 /** 3959 * Sets the visibility of the indeterminate progress bar in the title. 3960 * <p> 3961 * In order for the progress bar to be shown, the feature must be requested 3962 * via {@link #requestWindowFeature(int)}. 3963 * 3964 * @param visible Whether to show the progress bars in the title. 3965 */ 3966 public final void setProgressBarIndeterminateVisibility(boolean visible) { 3967 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 3968 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 3969 } 3970 3971 /** 3972 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 3973 * is always indeterminate). 3974 * <p> 3975 * In order for the progress bar to be shown, the feature must be requested 3976 * via {@link #requestWindowFeature(int)}. 3977 * 3978 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 3979 */ 3980 public final void setProgressBarIndeterminate(boolean indeterminate) { 3981 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3982 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 3983 } 3984 3985 /** 3986 * Sets the progress for the progress bars in the title. 3987 * <p> 3988 * In order for the progress bar to be shown, the feature must be requested 3989 * via {@link #requestWindowFeature(int)}. 3990 * 3991 * @param progress The progress for the progress bar. Valid ranges are from 3992 * 0 to 10000 (both inclusive). If 10000 is given, the progress 3993 * bar will be completely filled and will fade out. 3994 */ 3995 public final void setProgress(int progress) { 3996 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 3997 } 3998 3999 /** 4000 * Sets the secondary progress for the progress bar in the title. This 4001 * progress is drawn between the primary progress (set via 4002 * {@link #setProgress(int)} and the background. It can be ideal for media 4003 * scenarios such as showing the buffering progress while the default 4004 * progress shows the play progress. 4005 * <p> 4006 * In order for the progress bar to be shown, the feature must be requested 4007 * via {@link #requestWindowFeature(int)}. 4008 * 4009 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 4010 * 0 to 10000 (both inclusive). 4011 */ 4012 public final void setSecondaryProgress(int secondaryProgress) { 4013 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4014 secondaryProgress + Window.PROGRESS_SECONDARY_START); 4015 } 4016 4017 /** 4018 * Suggests an audio stream whose volume should be changed by the hardware 4019 * volume controls. 4020 * <p> 4021 * The suggested audio stream will be tied to the window of this Activity. 4022 * If the Activity is switched, the stream set here is no longer the 4023 * suggested stream. The client does not need to save and restore the old 4024 * suggested stream value in onPause and onResume. 4025 * 4026 * @param streamType The type of the audio stream whose volume should be 4027 * changed by the hardware volume controls. It is not guaranteed that 4028 * the hardware volume controls will always change this stream's 4029 * volume (for example, if a call is in progress, its stream's volume 4030 * may be changed instead). To reset back to the default, use 4031 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 4032 */ 4033 public final void setVolumeControlStream(int streamType) { 4034 getWindow().setVolumeControlStream(streamType); 4035 } 4036 4037 /** 4038 * Gets the suggested audio stream whose volume should be changed by the 4039 * harwdare volume controls. 4040 * 4041 * @return The suggested audio stream type whose volume should be changed by 4042 * the hardware volume controls. 4043 * @see #setVolumeControlStream(int) 4044 */ 4045 public final int getVolumeControlStream() { 4046 return getWindow().getVolumeControlStream(); 4047 } 4048 4049 /** 4050 * Runs the specified action on the UI thread. If the current thread is the UI 4051 * thread, then the action is executed immediately. If the current thread is 4052 * not the UI thread, the action is posted to the event queue of the UI thread. 4053 * 4054 * @param action the action to run on the UI thread 4055 */ 4056 public final void runOnUiThread(Runnable action) { 4057 if (Thread.currentThread() != mUiThread) { 4058 mHandler.post(action); 4059 } else { 4060 action.run(); 4061 } 4062 } 4063 4064 /** 4065 * Standard implementation of 4066 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 4067 * inflating with the LayoutInflater returned by {@link #getSystemService}. 4068 * This implementation does nothing and is for 4069 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 4070 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 4071 * 4072 * @see android.view.LayoutInflater#createView 4073 * @see android.view.Window#getLayoutInflater 4074 */ 4075 public View onCreateView(String name, Context context, AttributeSet attrs) { 4076 return null; 4077 } 4078 4079 /** 4080 * Standard implementation of 4081 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 4082 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 4083 * This implementation handles <fragment> tags to embed fragments inside 4084 * of the activity. 4085 * 4086 * @see android.view.LayoutInflater#createView 4087 * @see android.view.Window#getLayoutInflater 4088 */ 4089 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 4090 if (!"fragment".equals(name)) { 4091 return onCreateView(name, context, attrs); 4092 } 4093 4094 String fname = attrs.getAttributeValue(null, "class"); 4095 TypedArray a = 4096 context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment); 4097 if (fname == null) { 4098 fname = a.getString(com.android.internal.R.styleable.Fragment_name); 4099 } 4100 int id = a.getResourceId(com.android.internal.R.styleable.Fragment_id, View.NO_ID); 4101 String tag = a.getString(com.android.internal.R.styleable.Fragment_tag); 4102 a.recycle(); 4103 4104 int containerId = parent != null ? parent.getId() : 0; 4105 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 4106 throw new IllegalArgumentException(attrs.getPositionDescription() 4107 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 4108 } 4109 4110 // If we restored from a previous state, we may already have 4111 // instantiated this fragment from the state and should use 4112 // that instance instead of making a new one. 4113 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 4114 if (fragment == null && tag != null) { 4115 fragment = mFragments.findFragmentByTag(tag); 4116 } 4117 if (fragment == null && containerId != View.NO_ID) { 4118 fragment = mFragments.findFragmentById(containerId); 4119 } 4120 4121 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 4122 + Integer.toHexString(id) + " fname=" + fname 4123 + " existing=" + fragment); 4124 if (fragment == null) { 4125 fragment = Fragment.instantiate(this, fname); 4126 fragment.mFromLayout = true; 4127 fragment.mFragmentId = id != 0 ? id : containerId; 4128 fragment.mContainerId = containerId; 4129 fragment.mTag = tag; 4130 fragment.mInLayout = true; 4131 fragment.mImmediateActivity = this; 4132 fragment.mFragmentManager = mFragments; 4133 fragment.onInflate(attrs, fragment.mSavedFragmentState); 4134 mFragments.addFragment(fragment, true); 4135 4136 } else if (fragment.mInLayout) { 4137 // A fragment already exists and it is not one we restored from 4138 // previous state. 4139 throw new IllegalArgumentException(attrs.getPositionDescription() 4140 + ": Duplicate id 0x" + Integer.toHexString(id) 4141 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 4142 + " with another fragment for " + fname); 4143 } else { 4144 // This fragment was retained from a previous instance; get it 4145 // going now. 4146 fragment.mInLayout = true; 4147 fragment.mImmediateActivity = this; 4148 // If this fragment is newly instantiated (either right now, or 4149 // from last saved state), then give it the attributes to 4150 // initialize itself. 4151 if (!fragment.mRetaining) { 4152 fragment.onInflate(attrs, fragment.mSavedFragmentState); 4153 } 4154 mFragments.moveToState(fragment); 4155 } 4156 4157 if (fragment.mView == null) { 4158 throw new IllegalStateException("Fragment " + fname 4159 + " did not create a view."); 4160 } 4161 if (id != 0) { 4162 fragment.mView.setId(id); 4163 } 4164 if (fragment.mView.getTag() == null) { 4165 fragment.mView.setTag(tag); 4166 } 4167 return fragment.mView; 4168 } 4169 4170 /** 4171 * Print the Activity's state into the given stream. This gets invoked if 4172 * you run "adb shell dumpsys activity <activity_component_name>". 4173 * 4174 * @param prefix Desired prefix to prepend at each line of output. 4175 * @param fd The raw file descriptor that the dump is being sent to. 4176 * @param writer The PrintWriter to which you should dump your state. This will be 4177 * closed for you after you return. 4178 * @param args additional arguments to the dump request. 4179 */ 4180 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4181 writer.print(prefix); writer.print("Local Activity "); 4182 writer.print(Integer.toHexString(System.identityHashCode(this))); 4183 writer.println(" State:"); 4184 String innerPrefix = prefix + " "; 4185 writer.print(innerPrefix); writer.print("mResumed="); 4186 writer.print(mResumed); writer.print(" mStopped="); 4187 writer.print(mStopped); writer.print(" mFinished="); 4188 writer.println(mFinished); 4189 writer.print(innerPrefix); writer.print("mLoadersStarted="); 4190 writer.println(mLoadersStarted); 4191 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 4192 writer.println(mChangingConfigurations); 4193 writer.print(innerPrefix); writer.print("mCurrentConfig="); 4194 writer.println(mCurrentConfig); 4195 if (mLoaderManager != null) { 4196 writer.print(prefix); writer.print("Loader Manager "); 4197 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 4198 writer.println(":"); 4199 mLoaderManager.dump(prefix + " ", fd, writer, args); 4200 } 4201 mFragments.dump(prefix, fd, writer, args); 4202 } 4203 4204 /** 4205 * Bit indicating that this activity is "immersive" and should not be 4206 * interrupted by notifications if possible. 4207 * 4208 * This value is initially set by the manifest property 4209 * <code>android:immersive</code> but may be changed at runtime by 4210 * {@link #setImmersive}. 4211 * 4212 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4213 * @hide 4214 */ 4215 public boolean isImmersive() { 4216 try { 4217 return ActivityManagerNative.getDefault().isImmersive(mToken); 4218 } catch (RemoteException e) { 4219 return false; 4220 } 4221 } 4222 4223 /** 4224 * Adjust the current immersive mode setting. 4225 * 4226 * Note that changing this value will have no effect on the activity's 4227 * {@link android.content.pm.ActivityInfo} structure; that is, if 4228 * <code>android:immersive</code> is set to <code>true</code> 4229 * in the application's manifest entry for this activity, the {@link 4230 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 4231 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4232 * FLAG_IMMERSIVE} bit set. 4233 * 4234 * @see #isImmersive 4235 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4236 * @hide 4237 */ 4238 public void setImmersive(boolean i) { 4239 try { 4240 ActivityManagerNative.getDefault().setImmersive(mToken, i); 4241 } catch (RemoteException e) { 4242 // pass 4243 } 4244 } 4245 4246 /** 4247 * Start an action mode. 4248 * 4249 * @param callback Callback that will manage lifecycle events for this context mode 4250 * @return The ContextMode that was started, or null if it was canceled 4251 * 4252 * @see ActionMode 4253 */ 4254 public ActionMode startActionMode(ActionMode.Callback callback) { 4255 return mWindow.getDecorView().startActionMode(callback); 4256 } 4257 4258 /** 4259 * Give the Activity a chance to control the UI for an action mode requested 4260 * by the system. 4261 * 4262 * <p>Note: If you are looking for a notification callback that an action mode 4263 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 4264 * 4265 * @param callback The callback that should control the new action mode 4266 * @return The new action mode, or <code>null</code> if the activity does not want to 4267 * provide special handling for this action mode. (It will be handled by the system.) 4268 */ 4269 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 4270 initActionBar(); 4271 if (mActionBar != null) { 4272 return mActionBar.startActionMode(callback); 4273 } 4274 return null; 4275 } 4276 4277 /** 4278 * Notifies the Activity that an action mode has been started. 4279 * Activity subclasses overriding this method should call the superclass implementation. 4280 * 4281 * @param mode The new action mode. 4282 */ 4283 public void onActionModeStarted(ActionMode mode) { 4284 } 4285 4286 /** 4287 * Notifies the activity that an action mode has finished. 4288 * Activity subclasses overriding this method should call the superclass implementation. 4289 * 4290 * @param mode The action mode that just finished. 4291 */ 4292 public void onActionModeFinished(ActionMode mode) { 4293 } 4294 4295 // ------------------ Internal API ------------------ 4296 4297 final void setParent(Activity parent) { 4298 mParent = parent; 4299 } 4300 4301 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 4302 Application application, Intent intent, ActivityInfo info, CharSequence title, 4303 Activity parent, String id, NonConfigurationInstances lastNonConfigurationInstances, 4304 Configuration config) { 4305 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 4306 lastNonConfigurationInstances, config); 4307 } 4308 4309 final void attach(Context context, ActivityThread aThread, 4310 Instrumentation instr, IBinder token, int ident, 4311 Application application, Intent intent, ActivityInfo info, 4312 CharSequence title, Activity parent, String id, 4313 NonConfigurationInstances lastNonConfigurationInstances, 4314 Configuration config) { 4315 attachBaseContext(context); 4316 4317 mFragments.attachActivity(this); 4318 4319 mWindow = PolicyManager.makeNewWindow(this); 4320 mWindow.setCallback(this); 4321 mWindow.getLayoutInflater().setPrivateFactory(this); 4322 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 4323 mWindow.setSoftInputMode(info.softInputMode); 4324 } 4325 mUiThread = Thread.currentThread(); 4326 4327 mMainThread = aThread; 4328 mInstrumentation = instr; 4329 mToken = token; 4330 mIdent = ident; 4331 mApplication = application; 4332 mIntent = intent; 4333 mComponent = intent.getComponent(); 4334 mActivityInfo = info; 4335 mTitle = title; 4336 mParent = parent; 4337 mEmbeddedID = id; 4338 mLastNonConfigurationInstances = lastNonConfigurationInstances; 4339 4340 mWindow.setWindowManager(null, mToken, mComponent.flattenToString(), 4341 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 4342 if (mParent != null) { 4343 mWindow.setContainer(mParent.getWindow()); 4344 } 4345 mWindowManager = mWindow.getWindowManager(); 4346 mCurrentConfig = config; 4347 } 4348 4349 final IBinder getActivityToken() { 4350 return mParent != null ? mParent.getActivityToken() : mToken; 4351 } 4352 4353 final void performCreate(Bundle icicle) { 4354 onCreate(icicle); 4355 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 4356 com.android.internal.R.styleable.Window_windowNoDisplay, false); 4357 mFragments.dispatchActivityCreated(); 4358 } 4359 4360 final void performStart() { 4361 mFragments.noteStateNotSaved(); 4362 mCalled = false; 4363 mFragments.execPendingActions(); 4364 mInstrumentation.callActivityOnStart(this); 4365 if (!mCalled) { 4366 throw new SuperNotCalledException( 4367 "Activity " + mComponent.toShortString() + 4368 " did not call through to super.onStart()"); 4369 } 4370 mFragments.dispatchStart(); 4371 if (mAllLoaderManagers != null) { 4372 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 4373 mAllLoaderManagers.valueAt(i).finishRetain(); 4374 } 4375 } 4376 } 4377 4378 final void performRestart() { 4379 mFragments.noteStateNotSaved(); 4380 4381 synchronized (mManagedCursors) { 4382 final int N = mManagedCursors.size(); 4383 for (int i=0; i<N; i++) { 4384 ManagedCursor mc = mManagedCursors.get(i); 4385 if (mc.mReleased || mc.mUpdated) { 4386 if (!mc.mCursor.requery()) { 4387 throw new IllegalStateException( 4388 "trying to requery an already closed cursor"); 4389 } 4390 mc.mReleased = false; 4391 mc.mUpdated = false; 4392 } 4393 } 4394 } 4395 4396 if (mStopped) { 4397 mStopped = false; 4398 mCalled = false; 4399 mInstrumentation.callActivityOnRestart(this); 4400 if (!mCalled) { 4401 throw new SuperNotCalledException( 4402 "Activity " + mComponent.toShortString() + 4403 " did not call through to super.onRestart()"); 4404 } 4405 performStart(); 4406 } 4407 } 4408 4409 final void performResume() { 4410 performRestart(); 4411 4412 mFragments.execPendingActions(); 4413 4414 mLastNonConfigurationInstances = null; 4415 4416 mCalled = false; 4417 // mResumed is set by the instrumentation 4418 mInstrumentation.callActivityOnResume(this); 4419 if (!mCalled) { 4420 throw new SuperNotCalledException( 4421 "Activity " + mComponent.toShortString() + 4422 " did not call through to super.onResume()"); 4423 } 4424 4425 // Now really resume, and install the current status bar and menu. 4426 mCalled = false; 4427 4428 mFragments.dispatchResume(); 4429 mFragments.execPendingActions(); 4430 4431 onPostResume(); 4432 if (!mCalled) { 4433 throw new SuperNotCalledException( 4434 "Activity " + mComponent.toShortString() + 4435 " did not call through to super.onPostResume()"); 4436 } 4437 } 4438 4439 final void performPause() { 4440 mFragments.dispatchPause(); 4441 mCalled = false; 4442 onPause(); 4443 mResumed = false; 4444 if (!mCalled && getApplicationInfo().targetSdkVersion 4445 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 4446 throw new SuperNotCalledException( 4447 "Activity " + mComponent.toShortString() + 4448 " did not call through to super.onPause()"); 4449 } 4450 mResumed = false; 4451 } 4452 4453 final void performUserLeaving() { 4454 onUserInteraction(); 4455 onUserLeaveHint(); 4456 } 4457 4458 final void performStop() { 4459 if (mLoadersStarted) { 4460 mLoadersStarted = false; 4461 if (mLoaderManager != null) { 4462 if (!mChangingConfigurations) { 4463 mLoaderManager.doStop(); 4464 } else { 4465 mLoaderManager.doRetain(); 4466 } 4467 } 4468 } 4469 4470 if (!mStopped) { 4471 if (mWindow != null) { 4472 mWindow.closeAllPanels(); 4473 } 4474 4475 mFragments.dispatchStop(); 4476 4477 mCalled = false; 4478 mInstrumentation.callActivityOnStop(this); 4479 if (!mCalled) { 4480 throw new SuperNotCalledException( 4481 "Activity " + mComponent.toShortString() + 4482 " did not call through to super.onStop()"); 4483 } 4484 4485 synchronized (mManagedCursors) { 4486 final int N = mManagedCursors.size(); 4487 for (int i=0; i<N; i++) { 4488 ManagedCursor mc = mManagedCursors.get(i); 4489 if (!mc.mReleased) { 4490 mc.mCursor.deactivate(); 4491 mc.mReleased = true; 4492 } 4493 } 4494 } 4495 4496 mStopped = true; 4497 } 4498 mResumed = false; 4499 4500 // Check for Activity leaks, if enabled. 4501 StrictMode.conditionallyCheckInstanceCounts(); 4502 } 4503 4504 final void performDestroy() { 4505 mWindow.destroy(); 4506 mFragments.dispatchDestroy(); 4507 onDestroy(); 4508 if (mLoaderManager != null) { 4509 mLoaderManager.doDestroy(); 4510 } 4511 } 4512 4513 /** 4514 * @hide 4515 */ 4516 public final boolean isResumed() { 4517 return mResumed; 4518 } 4519 4520 void dispatchActivityResult(String who, int requestCode, 4521 int resultCode, Intent data) { 4522 if (Config.LOGV) Log.v( 4523 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 4524 + ", resCode=" + resultCode + ", data=" + data); 4525 mFragments.noteStateNotSaved(); 4526 if (who == null) { 4527 onActivityResult(requestCode, resultCode, data); 4528 } else { 4529 Fragment frag = mFragments.findFragmentByWho(who); 4530 if (frag != null) { 4531 frag.onActivityResult(requestCode, resultCode, data); 4532 } 4533 } 4534 } 4535} 4536